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 A067326 #4 Mar 31 2012 13:20:07 %S A067326 14,56,202,715,2529,8986,32123,115556,418200,1521976,5567551,20462525, %T A067326 75528895,279874350,1040790135,3883140600,14531382060,54529456320, %U A067326 205146226200,773608833894,2923686178098,11071970477876 %N A067326 Fifth column of triangle A067323. %C A067326 Also fifth diagonal of triangle A028364. %F A067326 a(n)= A067323(n+4, 4)= C(n+5)-sum(C(k)*C(n+4-k), k=0..3), C(n) := A000108(n) (Catalan). %F A067326 G.f.: (c(x)^3)*(5+5*c(x)+3*c(x)^2+c(x)^3), with c(x) g.f. of A000108 (Catalan). %Y A067326 Cf. A067325 (fourth column). %K A067326 nonn,easy %O A067326 0,1 %A A067326 _Wolfdieter Lang_, Feb 05 2002