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 A026840 #7 Mar 30 2012 18:56:11 %S A026840 1,0,1,0,1,2,0,0,1,2,0,0,1,2,3,0,0,1,2,3,4,0,0,0,2,3,4,5,0,0,0,1,3,4, %T A026840 5,6,0,0,0,1,3,5,6,7,8,0,0,0,1,3,5,7,8,9,10,0,0,0,0,2,5,7,9,10,11,12, %U A026840 0,0,0,0,2,5,8,10,12,13,14,15,0,0,0,0,1,4,8,11 %N A026840 Triangular array T read by rows: T(n,k) = number of partitions of n into distinct parts <= k, for k=1,2,...n. %Y A026840 Cf. A026836. %Y A026840 Differs from A079126 in having fewer zeros at the ends of the rows. %K A026840 nonn,tabl %O A026840 1,6 %A A026840 _Clark Kimberling_