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 A067984 #4 Mar 31 2012 13:20:07 %S A067984 18,83,206,459,940,1844,3504,6513,11902,21465,38302,67752,118974, %T A067984 207631,360430,622791,1071776,1837852,3141468,5354445,9102878, %U A067984 15439413,26131346,44141904,74433450,125306699 %N A067984 Convolution of L(n+1) := A000204(n+1) (Lucas), n>=0, with L(n+6), n>=0. %C A067984 Sixth diagonal of triangle A067979. Sixth column of triangle A067990. %F A067984 a(n)= sum(L(k+1)*L(n+6-k), k=0..n) = (29*n+18)*F(n+1)+18*(n+1)*F(n), with F(n) := A000045(n) (Fibonacci). %F A067984 G.f.: (18+11*x)*(1+2*x)/(1-x-x^2)^2. %K A067984 nonn,easy %O A067984 0,1 %A A067984 _Wolfdieter Lang_, Feb 15 2002