Numbers k such that (1_100.2_200.3_300 ... 8_800.9_900)*10^k + 1 is prime, i.e., 1 repeated 100 times, concatenated with 2 repeated 200 times, etc.
A108055
Numbers k such that (1_100.2_200.3_300 ... 8_800.9_900)*10^k + 1 is prime, i.e., 1 repeated 100 times, concatenated with 2 repeated 200 times, etc.
Terms
- a(0) =2395a(1) =3980a(2) =4584a(3) =9073a(4) =12115a(5) =22055a(6) =26457
External references
- oeis: A108055