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 A115367 #2 Mar 30 2012 18:59:13
%S A115367 1,2,2,4,4,4,5,6,7,6,9,6,9,6,10,8,12,8,14,8,14,8,16,8,16,8,16,8,16,8,
%T A115367 17,10,19,10,21,10,21,10,23
%N A115367 Row sums of correlation triangle for Fredholm-Rueppel sequence A036987.
%C A115367 If a sequence has g.f. A(x), its correlation triangle has g.f. A(x)A(x*y)/(1-x^2*y). (Observation due to Christian G. Bower).
%F A115367 G.f. : (sum{k>=0, x^(2k-1)})^2/(1-x^2); a(n)=sum{k=0..n, sum{j=0..k, A036987(j)}*sum{j=0..n-k, A036987(j)*(-1)^(n-k-j)}}.
%K A115367 easy,nonn
%O A115367 0,2
%A A115367 _Paul Barry_, Jan 21 2006