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 A072646 #7 Jul 30 2017 21:40:56 %S A072646 0,1,2,4,6,7,3,9,17,15,27,14,36,62,12,5,10,38,43,11,22,93,161,150,159, %T A072646 91,993,1624,28,35,61,384,413,69,235,2591,4243,16,46,25,37,39,19,20, %U A072646 24,242,415,44,237,1606,2627,33,8,23,72,56,58,98,1004,1080,100,111,614 %N A072646 Composition of the permutations A048680 & A072636, i.e., a(n) = A048680(A072636(n)). %H A072646 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> %H A072646 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A072646 Inverse permutation A072647. %K A072646 nonn %O A072646 0,3 %A A072646 _Antti Karttunen_, Jun 02 2002