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 A244731 #5 Jul 05 2014 11:10:22 %S A244731 1,2,5,6,10,11,12,13,17,21,22,23,24,25,29,30,46,47,51,52,53,54,58,59, %T A244731 69,70,71,76,79,88,89,90,98,101,111,112,113,114,118,119,120,133,137, %U A244731 141,142,143,148,151,160,161,177,183,184,185,189,190,191,192,193 %N A244731 Fixed points of the permutations A244724 and A244732. %C A244731 A244724(a(n)) = A244732(a(n)) = a(n). %H A244731 Reinhard Zumkeller, <a href="/A244731/b244731.txt">Table of n, a(n) for n = 1..10000</a> %o A244731 (Haskell) %o A244731 a244731 n = a244731_list !! (n-1) %o A244731 a244731_list = [x | x <- [1..], a244724 x == x] %K A244731 nonn %O A244731 1,2 %A A244731 _Reinhard Zumkeller_, Jul 05 2014