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A171045 In the sequence of prime numbers, replace all the '8' digits with '4' and vice versa. 3
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 81, 83, 87, 53, 59, 61, 67, 71, 73, 79, 43, 49, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 189, 151, 157, 163, 167, 173, 179, 141, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 281, 251, 257, 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, 4 -> q} /. {p -> 4, q -> 8}] & /@ Prime[Range[100]] (* Harvey P. Dale, Jun 10 2011 *)

PROG

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

CROSSREFS

Sequence in context: A012883 A296915 A171032 * A222566 A299171 A002267

Adjacent sequences:  A171042 A171043 A171044 * A171046 A171047 A171048

KEYWORD

nonn,base,easy

AUTHOR

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

STATUS

approved

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Last modified February 19 20:17 EST 2019. Contains 320328 sequences. (Running on oeis4.)