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 A067989 #3 Mar 31 2012 13:20:07 %S A067989 1,9,34,95,240,553,1212,2547,5195,10340,20184,38766,73451,137565, %T A067989 255080,468877,855288,1549583,2790510,4997895,8907481,15804634, %U A067989 27928464,49169100,86268325,150882993,263124862 %N A067989 Row sums of triangle A067979; also of triangle A067990. %F A067989 a(n)= (n+2)*((3*n+1)*F(n-1)/2+(2*n+1)*F(n)), with F(n) := A000045(n) (Fibonacci). %F A067989 G.f.: (1+4*x-x^2)*(1+2*x)/(1-x-x^2)^3. %K A067989 nonn,easy %O A067989 0,2 %A A067989 _Wolfdieter Lang_, Feb 15 2002