Sequences
392,541 sequences
- Numbers k such that 169*2^k+1 is prime.A032461
Numbers k such that 169*2^k+1 is prime.
- Numbers k such that 171*2^k+1 is prime.A032462
Numbers k such that 171*2^k+1 is prime.
- Numbers k such that 173*2^k+1 is prime.A032463
Numbers k such that 173*2^k+1 is prime.
- Numbers k such that 175*2^k+1 is prime.A032464
Numbers k such that 175*2^k+1 is prime.
- Numbers k such that 177*2^k+1 is prime.A032465
Numbers k such that 177*2^k+1 is prime.
- Numbers k such that 179*2^k+1 is prime.A032466
Numbers k such that 179*2^k+1 is prime.
- Numbers k such that 181*2^k+1 is prime.A032467
Numbers k such that 181*2^k+1 is prime.
- Numbers k such that 183*2^k+1 is prime.A032468
Numbers k such that 183*2^k+1 is prime.
- Numbers k such that 185*2^k+1 is a prime.A032469
Numbers k such that 185*2^k+1 is a prime.
- Numbers k such that 187*2^k+1 is prime.A032470
Numbers k such that 187*2^k+1 is prime.
- Numbers k such that 189*2^k+1 is prime.A032471
Numbers k such that 189*2^k+1 is prime.
- Numbers k such that 191*2^k+1 is prime.A032472
Numbers k such that 191*2^k+1 is prime.
- Numbers k such that 193*2^k+1 is prime.A032473
Numbers k such that 193*2^k+1 is prime.
- Numbers k such that 195*2^k+1 is prime.A032474
Numbers k such that 195*2^k+1 is prime.
- Numbers k such that 197*2^k+1 is prime.A032475
Numbers k such that 197*2^k+1 is prime.
- Numbers k such that 199*2^k+1 is prime.A032476
Numbers k such that 199*2^k+1 is prime.
- Numbers k such that 201*2^k+1 is prime.A032477
Numbers k such that 201*2^k+1 is prime.
- Numbers k such that 203*2^k + 1 is prime.A032478
Numbers k such that 203*2^k + 1 is prime.
- Numbers k such that 205*2^k+1 is prime.A032479
Numbers k such that 205*2^k+1 is prime.
- Numbers k such that 207*2^k + 1 is prime.A032480
Numbers k such that 207*2^k + 1 is prime.
- Numbers k such that 209*2^k+1 is prime.A032481
Numbers k such that 209*2^k+1 is prime.
- Numbers k such that 211*2^k+1 is prime.A032482
Numbers k such that 211*2^k+1 is prime.
- Numbers k such that 213*2^k+1 is prime.A032483
Numbers k such that 213*2^k+1 is prime.
- Numbers k such that 215*2^k+1 is prime.A032484
Numbers k such that 215*2^k+1 is prime.
- Numbers k such that 217*2^k+1 is prime.A032485
Numbers k such that 217*2^k+1 is prime.
- Numbers k such that 219*2^k+1 is prime.A032486
Numbers k such that 219*2^k+1 is prime.
- Numbers k such that 221*2^k+1 is prime.A032487
Numbers k such that 221*2^k+1 is prime.
- Numbers k such that 223*2^k+1 is prime.A032488
Numbers k such that 223*2^k+1 is prime.
- Numbers k such that 225*2^k+1 is prime.A032489
Numbers k such that 225*2^k+1 is prime.
- Numbers k such that 227*2^k+1 is prime.A032490
Numbers k such that 227*2^k+1 is prime.
- Numbers k such that 229*2^k+1 is prime.A032491
Numbers k such that 229*2^k+1 is prime.
- Numbers k such that 231*2^k+1 is prime.A032492
Numbers k such that 231*2^k+1 is prime.
- Numbers k such that 233*2^k+1 is prime.A032493
Numbers k such that 233*2^k+1 is prime.
- Numbers k such that 235*2^k+1 is prime.A032494
Numbers k such that 235*2^k+1 is prime.
- Numbers k such that 237*2^k+1 is prime.A032495
Numbers k such that 237*2^k+1 is prime.
- Numbers k such that 239*2^k+1 is prime.A032496
Numbers k such that 239*2^k+1 is prime.
- Numbers k such that 241*2^k+1 is prime.A032497
Numbers k such that 241*2^k+1 is prime.
- Numbers k such that 243*2^k+1 is prime.A032498
Numbers k such that 243*2^k+1 is prime.
- Numbers k such that 245*2^k+1 is prime.A032499
Numbers k such that 245*2^k+1 is prime.
- Numbers k such that 247*2^k+1 is prime.A032500
Numbers k such that 247*2^k+1 is prime.
- Numbers k such that 249*2^k+1 is prime.A032501
Numbers k such that 249*2^k+1 is prime.
- Numbers k such that 251*2^k+1 is prime.A032502
Numbers k such that 251*2^k+1 is prime.
- Numbers k such that 253*2^k+1 is prime.A032503
Numbers k such that 253*2^k+1 is prime.
- Numbers k such that 255*2^k+1 is prime.A032504
Numbers k such that 255*2^k+1 is prime.
- Numbers n such that 257*2^n+1 is prime.A032505
Numbers n such that 257*2^n+1 is prime.
- Numbers k such that 259*2^k+1 is prime.A032506
Numbers k such that 259*2^k+1 is prime.
- Numbers k such that 261*2^k+1 is prime.A032507
Numbers k such that 261*2^k+1 is prime.
- Numbers k such that 263*2^k+1 is prime.A032508
Numbers k such that 263*2^k+1 is prime.
- a(n) = round(tan(Pi*(1-1/n)/2)).A032509
a(n) = round(tan(Pi*(1-1/n)/2)).
- Scan decimal expansion of Pi until all n-digit strings have been seen; a(n) is last string seen.A032510
Scan decimal expansion of Pi until all n-digit strings have been seen; a(n) is last string seen.