Numbers n>0 such that (7*10^(n+2)+666)*10^n+7 is prime.
A186521
Numbers n>0 such that (7*10^(n+2)+666)*10^n+7 is prime.
Terms
- a(0) =1a(1) =3a(2) =6a(3) =7a(4) =49a(5) =578a(6) =793a(7) =1322a(8) =1392a(9) =2392a(10) =3066a(11) =13479
External references
- oeis: A186521