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 A093664 #3 Mar 30 2012 18:36:40 %S A093664 1,1,2,1,5,2,4,1,17,5,10,2,22,4,8,1,86,17,34,5,73,10,20,2,178,22,44,4, %T A093664 92,8,16,1,698,86,172,17,361,34,68,5,829,73,146,10,302,20,40,2,2251, %U A093664 178,356,22,734,44,88,4,1604,92,184,8,376,16,32,1,9551,698,1396,86,2878,172 %N A093664 Convergent of 2^n-th row of lower triangular matrix A093662. %F A093664 a(2^n+1) = A016121(n); a(2^n+1) = A093663(2^n) for n>=0. a(2*n) = a(n); a(2^n) = 1 for n>=0. %Y A093664 Cf. A016121, A093662, A093663. %K A093664 nonn %O A093664 1,3 %A A093664 _Paul D. Hanna_, Apr 08 2004