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.
%I A258744 #4 Jun 11 2015 09:39:18 %S A258744 1,10,11,12,15,16,17,20,21,22,25,28,29,33,34,38,39,42,45,46,47,50,53, %T A258744 54,55,56,57,58,59,60,63,64,65,68,69,73,74,75,76,77,78,79,82,85,88,89, %U A258744 90,93,94,95,96,97,100,103,104,107,108,109,113,114,115,118,119,120,121,122,125,126,127,128,129,130,133,134 %N A258744 Fixed points in A258742. %C A258744 Numbers n such that A258742(n) = n. %o A258744 (PARI) print1(1,", ");v=[1]; k=1; while(#v<=200, if(!isprime(k^2+v[#v]^2)&&!vecsearch(vecsort(v), k), v=concat(v, k); if(k==#v, print1(k, ", ")); k=0); k++) %Y A258744 Cf. A258742, A100208. %K A258744 nonn %O A258744 1,2 %A A258744 _Derek Orr_, Jun 08 2015