A180546 - OEIS

A180546

Primes that become a different prime under the mapping 4 <=> 5.

43, 53, 241, 251, 349, 359, 409, 421, 457, 463, 487, 499, 509, 521, 547, 563, 587, 599, 643, 653, 1249, 1259, 1423, 1453, 1459, 1471, 1483, 1523, 1543, 1549, 1571, 1583, 2143, 2153, 2341, 2347, 2351, 2357, 2441, 2447, 2459, 2549, 2551, 2557, 2647, 2657

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OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..2141

Index to Primes, Primes that become a different prime under some mapping.

MATHEMATICA

fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 4] || MemberQ[id, 5]) && PrimeQ[ FromDigits[ id /. {4 -> 5, 5 -> 4}] ]]; Select[ Prime@ Range@ 400, fQ]

CROSSREFS

Cf. A171027, A175791, A180517 thru A180559, A175789, A180560, A180561.

Sequence in context: A342771 A174818 A280388 * A166491 A127880 A078132

Adjacent sequences: A180543 A180544 A180545 * A180547 A180548 A180549

KEYWORD

base,nonn

AUTHOR

Zak Seidov and Robert G. Wilson v, Sep 09 2010

STATUS

approved