Except for initial term, primes of form "n 3's followed by 1".
A051200
Except for initial term, primes of form "n 3's followed by 1".
Terms
- a(0) =3a(1) =31a(2) =331a(3) =3331a(4) =33331a(5) =333331a(6) =3333331a(7) =33333331
External references
- oeis: A051200