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 A185085 #9 Sep 12 2015 11:00:24 %S A185085 1,6,36,412,4650,85358,1414678,32042312,710371744,20080400872, %T A185085 546562561108 %N A185085 Number of ways to place n nonattacking nightriders on an n X n board. %C A185085 A nightrider is a fairy chess piece that can move any distance in a direction specified by a knight move. %H A185085 V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a> %Y A185085 Cf. A196814, A190393. %K A185085 nonn,hard %O A185085 1,2 %A A185085 _Vaclav Kotesovec_, Dec 22 2011