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 A091497 #5 Mar 30 2012 18:36:40 %S A091497 1,2,2,3,3,3,4,4,4,4,5,6,6,6,6,6,7,7,8,8,8,8,8,8,9,10,10,10,11,11,11, %T A091497 11,11,11,11,12,12,13,13,13,13,14,15,15,15,15,15,15,15,15,16,17,17,17, %U A091497 18,18,18,18,18,19,19,20,20,20,20,20,20,20,20,20,21 %N A091497 Number of nonzero terms in the n-th row of triangle A091492. %Y A091497 Cf. A091492, A091493. Different from A087817 and A087836. %K A091497 nonn %O A091497 0,2 %A A091497 _Paul D. Hanna_, Jan 16 2004