Numbers k such that (10^(2k+1) + 12*10^k - 1)/3 is prime.
A183176
Numbers k such that (10^(2k+1) + 12*10^k - 1)/3 is prime.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =11a(4) =13a(5) =17a(6) =29a(7) =31a(8) =33a(9) =77a(10) =933a(11) =1555a(12) =11758a(13) =117707
External references
- oeis: A183176