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 A067431 #4 Mar 31 2012 13:20:07 %S A067431 21,55,131,275,550,1058,1985,3653,6625,11875,21084,37140,64989,113075, %T A067431 195775,337507,579650,992182,1693225,2881825,4892861,8288915,14013816, %U A067431 23649000,39841125,67014703,112558715 %N A067431 Convolution of Fibonacci F(n+1), n>=0, with F(n+8), n>=0. %C A067431 Eighth diagonal of A067330. Eighth column of A067418. %F A067431 a(n)= A067330(n+7, n) = A067418(n+7, 7) = sum(F(k+1)*F(n+8-k), k=0..n), n>=0. %F A067431 G.f.: (21+13*x)/(1-x-x^2)^2. %F A067431 a(n)= ((76*n+5*21)*F(n+1)+47*(n+1)*F(n))/5, F(n) := A000045(n) (Fibonacci); 21=F(8), 76=L(9), 47=L(8), L(n) := A000204(n) (Lucas). %K A067431 nonn,easy %O A067431 0,1 %A A067431 _Wolfdieter Lang_, Feb 15 2002