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 A058090 #6 Nov 14 2013 12:09:34 %S A058090 2,48,504,6000,73260,951984,13152984,193295952,3016469790,49879061920, %T A058090 871884630672,16072938332064,311769325656312,6349343550308640, %U A058090 135485465497382160,3023380765038115680,70429101211136913498,1709801309366361996624 %N A058090 Coefficients of ménage hit polynomials. %D A058090 J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 197. %Y A058090 A diagonal of A058087. Cf. A000179, A000425. %K A058090 nonn %O A058090 7,1 %A A058090 _N. J. A. Sloane_, Dec 02 2000