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 A076023 #6 Mar 30 2012 17:26:04 %S A076023 1,14,16,23,27,30,34,37,52,54,58,64,68,75,103,173,260,265,309,311,374, %T A076023 423,446,453,493,535,557,560,599,605,627,629,639,659,678,695,697,717, %U A076023 737,747,750,754,760,790,795,803,844,879,885,901,911,956,972,975,978 %N A076023 Numbers n such that A076022(n)=n. %C A076023 From first 5000 even numbers, 204 retain their place in rearrangement A073662 and they (that is even_number/2) are in the sequence. Positions of each even number in A073662 are in A076022. %Y A076023 Cf. A073662, A076022. %K A076023 nonn %O A076023 1,2 %A A076023 _Zak Seidov_, Oct 01 2002