Primes of the form b^2*10^(2*k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.
A309738
Primes of the form b^2*10^(2*k) + b*10^k + 1 for 1 <= b <= 9, k >= 0.
Terms
- a(0) =3a(1) =7a(2) =13a(3) =31a(4) =43a(5) =73a(6) =421a(7) =2551a(8) =6481a(9) =8191a(10) =250501a(11) =4002001a(12) =64008001a(13) =81009001a(14) =40000200001a(15) =90000300001
External references
- oeis: A309738