Numbers k such that (1_666.2_666.3_666 ... 8_666.9_666)*10^k + 1 is prime, i.e., 1 repeated 666 times, concatenated with 2 repeated 666 times, etc.
A106488
Numbers k such that (1_666.2_666.3_666 ... 8_666.9_666)*10^k + 1 is prime, i.e., 1 repeated 666 times, concatenated with 2 repeated 666 times, etc.
Terms
- a(0) =641a(1) =1788a(2) =1918a(3) =3731a(4) =7093a(5) =8009a(6) =22770a(7) =28600a(8) =91321a(9) =93760
External references
- oeis: A106488