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Number of graphs with 2n vertices that have an odd determinant for their adjacency matrix.
3

%I #5 Nov 04 2017 17:45:50

%S 1,4,47,4043,4553432

%N Number of graphs with 2n vertices that have an odd determinant for their adjacency matrix.

%Y Cf. A000088, A140981.

%K hard,more,nonn

%O 1,2

%A _Tanya Khovanova_, Aug 18 2008

%E a(4)-a(5) from _Andrew Howroyd_, Nov 04 2017