cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A180553 Primes that become a different prime under the mapping 5 <=> 8.

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%I A180553 #11 Oct 30 2023 17:12:16
%S A180553 53,59,83,89,151,181,251,281,353,359,383,389,457,487,509,521,523,557,
%T A180553 563,577,587,653,683,757,787,809,821,823,857,863,877,887,953,983,1151,
%U A180553 1181,1259,1289,1451,1453,1459,1481,1483,1489,1511,1523,1531,1559,1567
%N A180553 Primes that become a different prime under the mapping 5 <=> 8.
%H A180553 Robert Price, <a href="/A180553/b180553.txt">Table of n, a(n) for n = 1..3698</a>
%H A180553 <a href="/index/Pri#primes">Index to Primes</a>, Primes that become a different prime under some mapping.
%t A180553 fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 5] || MemberQ[id, 8]) && PrimeQ[ FromDigits[ id /. {5 -> 8, 8 -> 5}] ]]; Select[ Prime@ Range@ 250, fQ]
%Y A180553 Cf. A171046, A175791, A180517 thru A180559, A175789, A180560, A180561.
%K A180553 base,nonn
%O A180553 1,1
%A A180553 _Zak Seidov_ and _Robert G. Wilson v_, Sep 09 2010