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 A259882 #7 Jul 10 2015 17:04:26 %S A259882 0,2,2,6,4,22,14,102,62 %N A259882 Number of graphs with n edges having a proper labeling that is bilaterally symmetric and satisfies condition (4.1) of Sheppard (1976). %H A259882 David A. Sheppard, <a href="http://dx.doi.org/10.1016/0012-365X(76)90051-0">The factorial representation of major balanced labelled graphs</a>, Discrete Math., 15(1976), no. 4, 379-388. See Table 1. %Y A259882 Cf. A005193, A005194. %K A259882 nonn,more %O A259882 1,2 %A A259882 _N. J. A. Sloane_, Jul 10 2015