Numbers n such that 10^n*(7+3*10^n)+3 is prime.
A171655
Numbers n such that 10^n*(7+3*10^n)+3 is prime.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =7a(5) =20a(6) =22a(7) =65a(8) =122a(9) =355a(10) =561a(11) =2216a(12) =5638a(13) =7271
External references
- oeis: A171655