A086479 Number of invertible circulant (0,1) matrices over the reals that have even determinant.

0, 0, 3, 0, 15, 12, 77, 32, 261, 260, 1023, 1056, 4095, 6552, 19905, 15872, 66045, 97740, 262143, 321320, 1404375, 1391720, 4198397, 6108912, 17619525, 23153832, 79255071, 116921224, 268435455, 529405320, 1259979965, 1408246784

Offset: 1

Author

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

Keywords

• nonn

Crossrefs

Cf. A003473, A086323, A086324.

Formula

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

Extensions

More terms from Max Alekseyev, Sep 25 2009