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 A072793 #5 May 01 2014 02:47:43 %S A072793 0,1,2,3,4,5,6,7,9,10,8,12,11,17,13,14,15,19,20,22,23,16,25,18,33,24, %T A072793 38,26,27,28,30,31,40,41,43,44,21,46,32,51,29,67,45,72,34,35,36,53,54, %U A072793 48,49,74,75,56,57,37,59,39,88,50,80,52,122,58,93,60,61,62,64,65,82,83 %N A072793 Simple tabular N X N -> N bijection: first interleave the bits as with A054238, then apply the bijection A048680. %H A072793 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A072793 (define (A072793 n) (A048680 (A054238 n))) %Y A072793 Inverse: A072794. Composition of A048680 & A054238. The X-projection: A072661, The Y-projection: A072662. Used in global arithmetic ranking scheme presented in A072656. %K A072793 nonn,tabl %O A072793 0,3 %A A072793 _Antti Karttunen_, Jun 12 2002