A171022 In the sequence of prime numbers, replace all the '4' digits with '3' and vice versa.

2, 4, 5, 7, 11, 14, 17, 19, 24, 29, 41, 47, 31, 34, 37, 54, 59, 61, 67, 71, 74, 79, 84, 89, 97, 101, 104, 107, 109, 114, 127, 141, 147, 149, 139, 151, 157, 164, 167, 174, 179, 181, 191, 194, 197, 199, 211, 224, 227, 229, 244, 249, 231, 251, 257, 264

Offset

1,1

Links

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

Mathematica

FromDigits[IntegerDigits[#]/.{4->p, 3->q}/.{p->3, q->4}]&/@Prime[Range[100]] (* Vincenzo Librandi, Apr 07 2013 *)

Prog

(PARI) a(n)=my(v=[0, 1, 2, 4, 3, 5, 6, 7, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 16 2013

Crossrefs

Sequence in context: A039673 A097581 A090614 * A097697 A035620 A363045

Adjacent sequences: A171019 A171020 A171021 * A171023 A171024 A171025

Keyword

nonn,base,easy

Author

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

Status

approved