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 A093660 #3 Mar 30 2012 18:36:40 %S A093660 1,2,2,5,2,5,5,16,2,5,5,16,5,16,16,65,2,5,5,16,5,16,16,65,5,16,16,65, %T A093660 16,65,65,326,2,5,5,16,5,16,16,65,5,16,16,65,16,65,65,326,5,16,16,65, %U A093660 16,65,65,326,16,65,65,326,65,326,326,1957 %N A093660 Row sums of lower triangular matrix A093658. %C A093660 Records form A000522 (total number of arrangements of set of n elements). Partial sums form A093661, where A093661(2^n) = A010842(n) (incomplete Gamma Function at 2). %F A093660 a(2^n) = A000522(n) for n>=0. a(2^n+2^m) = a(2^(m+1)) for n>m>=0. %Y A093660 Cf. A000522, A010842, A093658, A093661. %K A093660 nonn %O A093660 1,2 %A A093660 _Paul D. Hanna_, Apr 08 2004