A180538 Primes that become a different prime under the mapping 2 <=> 8.

23, 29, 83, 89, 211, 223, 227, 239, 257, 263, 277, 281, 283, 727, 787, 811, 821, 823, 839, 857, 863, 877, 883, 887, 1201, 1229, 1231, 1277, 1279, 1283, 1321, 1381, 1423, 1427, 1429, 1483, 1487, 1489, 1523, 1583, 1723, 1783, 1801, 1823, 1831, 1877, 1879

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..4005

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

Mathematica

fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 2] || MemberQ[id, 8]) && PrimeQ[ FromDigits[ id /. {2 -> 8, 8 -> 2}] ]]; Select[ Prime@ Range@ 300, fQ]

Crossrefs

Cf. A171043, A175791, A180517 thru A180559, A175789, A180560, A180561.

Sequence in context: A355983 A110584 A115396 * A227217 A229176 A232726

Adjacent sequences: A180535 A180536 A180537 * A180539 A180540 A180541

Keyword

base,nonn

Author

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

Status

approved