A171051 - OEIS

A171051

In the sequence of prime numbers, replace all the '9' digits with '2' and vice versa.

9, 3, 5, 7, 11, 13, 17, 12, 93, 92, 31, 37, 41, 43, 47, 53, 52, 61, 67, 71, 73, 72, 83, 82, 27, 101, 103, 107, 102, 113, 197, 131, 137, 132, 142, 151, 157, 163, 167, 173, 172, 181, 121, 123, 127, 122, 911, 993, 997, 992, 933, 932, 941, 951, 957, 963

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OFFSET

1,1

LINKS

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

MATHEMATICA

FromDigits[IntegerDigits[#] /. {9 -> p, 2 -> q} /. {p -> 2, q -> 9}] & /@ Prime[Range[100]] (* Harvey P. Dale, Apr 11 2012 *)

PROG

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

CROSSREFS

Sequence in context: A324995 A200007 A153618 * A230158 A307960 A224235

Adjacent sequences: A171048 A171049 A171050 * A171052 A171053 A171054

KEYWORD

nonn,base,easy

AUTHOR

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

STATUS

approved