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 A137631 #2 Mar 30 2012 17:25:27 %S A137631 1,2,4,7,11,18,26,39,55,79,106,150,196,267 %N A137631 Left border of triangle A137629. %F A137631 A026794 * A000041 = product of the partition triangle and the partitions of n. %e A137631 a(4) = 7 = (3, 1, 0, 1) dot (1, 1, 2, 3), where (3, 1, 0, 1) = row 4 of the partition triangle A026794 and (1, 1, 2, 3) = the first 4 terms of A000041. %Y A137631 Cf. A000041, A026794, A137629. %K A137631 nonn %O A137631 1,2 %A A137631 _Gary W. Adamson_, Jan 31 2008