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 A141040 #5 Nov 04 2017 17:45:50 %S A141040 1,4,47,4043,4553432 %N A141040 Number of graphs with 2n vertices that have an odd determinant for their adjacency matrix. %Y A141040 Cf. A000088, A140981. %K A141040 hard,more,nonn %O A141040 1,2 %A A141040 _Tanya Khovanova_, Aug 18 2008 %E A141040 a(4)-a(5) from _Andrew Howroyd_, Nov 04 2017