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A171025 In the sequence of prime numbers, replace all the '5' digits with '2' and vice versa. 3
5, 3, 2, 7, 11, 13, 17, 19, 53, 59, 31, 37, 41, 43, 47, 23, 29, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 157, 131, 137, 139, 149, 121, 127, 163, 167, 173, 179, 181, 191, 193, 197, 199, 511, 553, 557, 559, 533, 539, 541, 521, 527, 563 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

FromDigits[IntegerDigits[#]/.{5->p, 2->q}/.{p->2, q->5}]&/@Prime[Range[100]] (* Vincenzo Librandi, Apr 07 2013 *)

PROG

(PARI) a(n)=my(v=[0, 1, 5, 3, 4, 2, 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: A023576 A271523 A125844 * A222362 A176524 A309276

Adjacent sequences:  A171022 A171023 A171024 * A171026 A171027 A171028

KEYWORD

nonn,base,easy

AUTHOR

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

STATUS

approved

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Last modified November 30 09:34 EST 2021. Contains 349419 sequences. (Running on oeis4.)