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 A067987 #4 Mar 31 2012 13:20:07 %S A067987 76,351,872,1943,3980,7808,14838,27581,50404,90905,162214,286944, %T A067987 503888,879387,1526560,2637787,4539472,7784224,13305786,22679065, %U A067987 38555996,65395261,110682602,186969408,315274900 %N A067987 Convolution of L(n+1) := A000204(n+1) (Lucas), n>=0, with L(n+9), n>=0. %C A067987 Ninth diagonal of triangle A067979. Ninth column of triangle A067990. %F A067987 a(n)= sum(L(k+1)*L(n+9-k), k=0..n) = (123*n+76)*F(n+1)+76*(n+1)*F(n), with F(n) := A000045(n) (Fibonacci). %F A067987 G.f.: (76+47*x)*(1+2*x)/(1-x-x^2)^2. %K A067987 nonn,easy %O A067987 0,1 %A A067987 _Wolfdieter Lang_, Feb 15 2002