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 A163237 #4 Mar 31 2012 13:21:18 %S A163237 0,1,3,5,2,15,4,6,14,12,20,7,10,13,60,21,23,11,9,61,63,17,22,27,8,57, %T A163237 62,51,16,18,26,24,56,58,50,48,80,19,30,25,40,59,54,49,240,81,83,31, %U A163237 29,41,43,55,53,241,243,85,82,95,28,45,42,39,52,245,242,255,84,86,94 %N A163237 a(i,j) = bits of binary expansion of A003188(i) interleaved with that of A003188(j), then converted with A163241. %H A163237 A. Karttunen, <a href="/A163237/b163237.txt">Table of n, a(n) for n = 0..2079</a> %H A163237 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A163237 Inverse: A163238. a(n) = A163241(A163233(n)). Transpose: A163239. Cf. A147995. %K A163237 nonn,tabl %O A163237 0,3 %A A163237 _Antti Karttunen_, Jul 29 2009