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 A166489 #10 Mar 31 2012 20:25:00 %S A166489 2,12,0,480,374400,3528000,0 %N A166489 Number of standard SOLSSOMs of order n. %C A166489 A SOLSSOM is a self-orthogonal Latin square with a symmetric orthogonal mate. A SOLSSOM is standard if the self-orthogonal Latin square is idempotent and if the symmetric mate is reduced. %D A166489 A.P. Burger, M.P. Kidd and J.H. van Vuuren, Enumeration of self-orthogonal Latin squares with symmetric orthogonal mates, Submitted to LitNet Akademies (Natuurwetenskappe) %Y A166489 Cf. A166487, A166488, A166490 %K A166489 hard,more,nonn %O A166489 4,1 %A A166489 _Martin P Kidd_, Oct 21 2009 %E A166489 Definition and number of order 8 (now includes non-unipotent SOLSSOMs) corrected by _Martin P Kidd_, Nov 01 2010