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 A259262 #6 Jun 23 2015 11:21:36 %S A259262 4,10,15,35,116,242,396 %N A259262 Fixed points in A083275. %C A259262 Numbers n such that A083275(n) = n. %C A259262 a(8) > 1200. - _Giovanni Resta_, Jun 23 2015 %o A259262 (PARI) v=[3];n=1;while(#v<300,s=-1+n*prod(i=1,#v,v[i]);if(ispseudoprime(s)&&!vecsearch(vecsort(v),n),v=concat(v,n);if(n==#v,print1(n,", "));n=0);n++) %Y A259262 Cf. A083275. %K A259262 nonn,hard,more %O A259262 1,1 %A A259262 _Derek Orr_, Jun 22 2015 %E A259262 a(7) from _Giovanni Resta_, Jun 23 2015