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 A271862 #7 Apr 19 2016 02:36:22 %S A271862 1,2,3,5,4,13,6,8,7,9,16,10,17,12,11,14,34,18,15,21,19,25,27,20,24,31, %T A271862 23,22,32,26,42,39,33,28,40,30,29,49,38,37,35,81,59,36,41,50,61,45,43, %U A271862 51,48,44,92,47,46,58,54,52,60,75,53,73,64,55,71,57,56 %N A271862 Inverse of A271861. %H A271862 Max Barrentine, <a href="/A271862/b271862.txt">Table of n, a(n) for n = 1..1102</a> %Y A271862 Cf. A271861. %K A271862 nonn %O A271862 1,2 %A A271862 _Max Barrentine_, Apr 15 2016