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A171048 In the sequence of prime numbers, replace all the '8' digits with '7' and vice versa. 3
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 (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[#]/.{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

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Last modified October 20 04:37 EDT 2019. Contains 328247 sequences. (Running on oeis4.)