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 A180527 Primes that become a different prime under the mapping 1 <=> 4. 0
 13, 17, 43, 47, 109, 113, 139, 149, 157, 163, 167, 179, 199, 317, 347, 409, 419, 439, 443, 457, 463, 467, 479, 499, 613, 617, 643, 647, 1019, 1049, 1093, 1109, 1117, 1123, 1163, 1193, 1213, 1229, 1249, 1259, 1283, 1289, 1297, 1319, 1327, 1373, 1427, 1429 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Index to Primes, Primes that become a different prime under some mapping. MATHEMATICA fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 1] || MemberQ[id, 4]) && PrimeQ[ FromDigits[ id /. {1 -> 4, 4 -> 1}] ]]; Select[ Prime@ Range@ 250, fQ] CROSSREFS Cf. A171020, A175791, A180517 thru A180559, A175789, A180560, A180561. Sequence in context: A156553 A248474 A140533 * A076789 A089577 A214393 Adjacent sequences:  A180524 A180525 A180526 * A180528 A180529 A180530 KEYWORD base,nonn AUTHOR Zak Seidov and Robert G. Wilson v, Sep 09 2010 STATUS approved

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Last modified September 22 16:59 EDT 2019. Contains 327311 sequences. (Running on oeis4.)