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 A072794 #6 May 01 2014 02:47:43 %S A072794 0,1,2,3,4,5,6,7,10,8,9,12,11,14,15,16,21,13,23,17,18,36,19,20,25,22, %T A072794 27,28,29,40,30,31,38,24,44,45,46,55,26,57,32,33,78,34,35,42,37,82,49, %U A072794 50,59,39,61,47,48,136,53,54,63,56,65,66,67,86,68,69,80,41,90,91,92 %N A072794 Inverse permutation to A072793. %H A072794 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A072794 (define (A072794 n) (A054239 (A048679 n))) %Y A072794 Composition of A054239 & A048679. %K A072794 nonn %O A072794 0,3 %A A072794 _Antti Karttunen_, Jun 12 2002