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 A119010 #6 Jun 18 2025 18:02:05 %S A119010 0,4,0,192,8960,371200,0,4081029120,1414035671040 %N A119010 Number of symmetric n X n (+1,-1)-matrices over the reals with zero permanent. %Y A119010 Cf. A086906, A088672, A118988, A118989, A118990, A118993, A118995, A118999, A119001. %K A119010 nonn,more %O A119010 1,2 %A A119010 _Giovanni Resta_, May 08 2006 %E A119010 a(8)-a(9) from _Max Alekseyev_, Jun 18 2025