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 A109469 #6 Nov 14 2013 12:10:44 %S A109469 0,2,5,9,49,259,1736,13408,117664,1153714,12492569,147987413, %T A109469 1903194061,26402007855,392928613560,6244069139240,105515436903720, %U A109469 1889249822655882,35726927316484053,711526052649064073 %N A109469 Cumulative sum of coefficients of ménage hit polynomials (A000033). %Y A109469 Cf. A000033. %K A109469 easy,nonn %O A109469 1,2 %A A109469 _Jonathan Vos Post_, Aug 27 2005