A171032 In the sequence of prime numbers, replace all the '6' digits with '4' and vice versa.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 61, 63, 67, 53, 59, 41, 47, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 169, 151, 157, 143, 147, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 261, 251, 257, 243

Offset

1,1

Links

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

Mathematica

FromDigits[IntegerDigits[#]/.{6->p, 4->q}/.{p->4, q->6}]&/@Prime[Range[100]] (* Vincenzo Librandi, Apr 07 2013 *)

Prog

(PARI) a(n)=my(v=[0, 1, 2, 3, 6, 5, 4, 7, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 25 2013

Crossrefs

Sequence in context: A038612 A012883 A296915 * A171045 A222566 A299171

Adjacent sequences: A171029 A171030 A171031 * A171033 A171034 A171035

Keyword

nonn,base,easy

Author

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

Status

approved