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 A058086 #6 Nov 14 2013 12:09:20 %S A058086 1,21,196,2100,23310,277662,3541188,48323988,703842951,10911044795, %T A058086 179505659256,3125293564568,57431191568268,1111135121304012, %U A058086 22580910916230360,480992394437882040,10717471923433878141,249346024282594457841 %N A058086 Coefficients of ménage hit polynomials. %D A058086 J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 198. %Y A058086 A diagonal of A058057. %K A058086 nonn %O A058086 6,2 %A A058086 _N. J. A. Sloane_, Dec 02 2000