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 A166487 #12 Jul 22 2025 07:25:59 %S A166487 1,1,0,2,32,26,0 %N A166487 Number of (row,column)-paratopism classes of SOLSSOMs of order n. %C A166487 A SOLSSOM is a self-orthogonal Latin square with a symmetric orthogonal mate. Two SOLSSOMs (L,S) and (L',S') are (row,column)-paratopic if a permutation applied to the rows and columns of L and S and two permutations applied to the symbols of L and S, respectively, maps (L,S) to (L',S') or (L'',S') (where L'' is the transpose of L'). %D A166487 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 A166487 Cf. A166488, A166489, A166490 %K A166487 hard,more,nonn %O A166487 4,4 %A A166487 _Martin P Kidd_, Oct 21 2009 %E A166487 Class names corrected, and results for not only unipotent SOLSSOMs provided by _Martin P Kidd_, Nov 01 2010