Number of n-digit dihedral primes for which the 4 numbers (n, n upside-down, n in a mirror, n upside-down and mirrored) are distinct.
A048661
Number of n-digit dihedral primes for which the 4 numbers (n, n upside-down, n in a mirror, n upside-down and mirrored) are distinct.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =4a(6) =12a(7) =16a(8) =132a(9) =308a(10) =1096a(11) =3704a(12) =12984a(13) =47008a(14) =179660a(15) =681608
External references
- oeis: A048661