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 A058401 #3 Mar 31 2012 13:20:04 %S A058401 1,3,2,6,5,3,13,12,9,5,22,21,18,13,7,42,41,37,30,21,11,66,65,61,53,42, %T A058401 29,15,112,111,106,96,81,63,43,22,172,171,166,154,136,113,87,59,30, %U A058401 270,269,263,249,226,196,161,123,83,42,397,396,390,374,347,310,266,217,165 %N A058401 Triangle of partial row sums of partition triangle A026820. %C A058401 m=1 column: A058397(n). %F A058401 a(n, m)= sum(A026820(n, k), k=m..n). %e A058401 1; 3,2; 6,5,3; 13,12,9,5; ... %Y A058401 Cf. A026820, A058397. %K A058401 nonn,tabl %O A058401 1,2 %A A058401 _Wolfdieter Lang_, Dec 11 2000