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 A091493 #3 Mar 30 2012 18:36:40 %S A091493 1,2,2,3,3,4,5,6,7,9,11,14,17,21,26,32,40,49,62,75,93,113,140,170,209, %T A091493 255,313,383,468,567,693,840,1022,1235,1503,1816,2209,2667,3248,3923, %U A091493 4754,5743,6949,8384,10126,12195,14717,17726,21369,25732,31020,37393 %N A091493 Row sums of triangle A091492. %Y A091493 Cf. A091492, A091497. %K A091493 nonn %O A091493 0,2 %A A091493 _Paul D. Hanna_, Jan 16 2004