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Number of invertible circulant (0,1) matrices over the reals that have even determinant.
1

%I #4 Mar 30 2012 17:26:50

%S 0,0,3,0,15,12,77,32,261,260,1023,1056,4095,6552,19905,15872,66045,

%T 97740,262143,321320,1404375,1391720,4198397,6108912,17619525,

%U 23153832,79255071,116921224,268435455,529405320,1259979965,1408246784

%N Number of invertible circulant (0,1) matrices over the reals that have even determinant.

%F a(n) = A086323(n) - A003473(n)

%Y Cf. A003473, A086323, A086324.

%K nonn

%O 1,3

%A Yuval Dekel (dekelyuval(AT)hotmail.com), Sep 09 2003

%E More terms from _Max Alekseyev_, Sep 25 2009