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 A118927 #3 Mar 30 2012 18:36:57
%S A118927 1,1,3,11,47,219,1083,5597,29933,164547,925289,5303409,30898069,
%T A118927 182587159,1092498017,6609496707,40383429717,248940496629,
%U A118927 1546962207417,9683696676693,61024927547241,386936560902269,2467341175475253
%N A118927 Self-convolution square-root of A118926.
%e A118927 A118926 satisfies: A118926(n) = Sum_{k=0,[n/2]} A104546(n,k)*A118926(k),
%e A118927 where A104546(n,k) is the number of Schroeder paths of length 2n and having k platforms. Is this sequence always integer?
%Y A118927 Cf. A118926, A104546.
%K A118927 nonn
%O A118927 0,3
%A A118927 _Paul D. Hanna_, May 06 2006