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 A067308 #7 Feb 10 2014 01:21:13 %S A067308 16,185,2181,26860,342968,4504944,60509296,827456576,11482655232, %T A067308 161302619392,2289365653760,32780329073664,472951175022592, %U A067308 6869148315201536,100352220112662528,1473672361011920896 %N A067308 One sixteenth of fifth column of triangle A067304. %F A067308 a(n)= A067304(n+4, 4)/15 = (A067297(n+4)-sum(b(j)b(n+4-j), j=0..3))/16, n>=0, with b(n) := A064340(n). %F A067308 G.f.: (21+70c(4*x)+93*c(4*x)^2+60*c(4*x)^3+12*c(4*x)^4)*(c(4*x)^3)/(1+c(4*x))^4, with c(x) g.f. of A000108 (Catalan). %e A067308 21+70*y+93*y^2+60*y^3 = p(4,y), fifth row polynomial of triangle A067329. %K A067308 nonn,easy %O A067308 0,1 %A A067308 _Wolfdieter Lang_, Feb 05 2002