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 A111341 #17 Jul 24 2025 05:49:30 %S A111341 0,0,0,0,0,396,6120,10934400,1225559160,130025295822240, %T A111341 252282619805005440,2209617218725251390961920, %U A111341 98758655816833727741298666240 %N A111341 Number of Latin squares in dimension n with first row and first column 1,2,3,...,n that are non-associative but commutative (element ij = element ji). %C A111341 At order 6 there are commutative but non-associative Latin squares. - _Artur Jasinski_, Dec 08 2006 %F A111341 a(n) = A035481(n) - A058162(n). %K A111341 nonn,more %O A111341 1,6 %A A111341 _Artur Jasinski_, Nov 06 2005 %E A111341 a(5) corrected and a(8)-a(13) added by _Max Alekseyev_, Jul 23 2025