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 A178986 #12 Nov 19 2017 12:47:47 %S A178986 1,0,0,0,0,0,0,0,0,0,44,0,1092,0,0,0,16932,0,24776,0,0,0,1881492,0 %N A178986 Number of ways to place n nonattacking amazons (superqueens) on an n X n toroidal board. %C A178986 An amazon (superqueen) moves like a queen and a knight. %H A178986 V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a>, 6ed, 2013. %H A178986 Paul Monsky, <a href="http://www.jstor.org/stable/2325220">Superqueens: Problem E3162</a>, American Mathematical Monthly, vol. 96 (1989), p.258-259. %Y A178986 Cf. A051223, A051906, A085801, A000170, A178975. %K A178986 nonn,more %O A178986 1,11 %A A178986 _Vaclav Kotesovec_, Jan 03 2011