A171048 In the sequence of prime numbers, replace all the '8' digits with '7' and vice versa.

2, 3, 5, 8, 11, 13, 18, 19, 23, 29, 31, 38, 41, 43, 48, 53, 59, 61, 68, 81, 83, 89, 73, 79, 98, 101, 103, 108, 109, 113, 128, 131, 138, 139, 149, 151, 158, 163, 168, 183, 189, 171, 191, 193, 198, 199, 211, 223, 228, 229, 233, 239, 241, 251, 258, 263

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

FromDigits[IntegerDigits[#]/.{8->p, 7->q}/.{p->7, q->8}]&/@Prime[Range[100]] (* Vincenzo Librandi, Mar 11 2013 *)

Prog

(PARI) a(n)=my(v=[0, 1, 2, 3, 4, 5, 6, 8, 7, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 31 2013

Crossrefs

Sequence in context: A106637 A246361 A228855 * A209292 A185371 A071894

Adjacent sequences: A171045 A171046 A171047 * A171049 A171050 A171051

Keyword

nonn,base,easy

Author

N. J. A. Sloane and Vincenzo Librandi, Sep 04 2010

Status

approved