A086323 Number of n X n circulant invertible (0,1) matrices over the reals.

1, 2, 6, 8, 30, 36, 126, 160, 450, 740, 2046, 2592, 8190, 12824, 30030, 48640, 131070, 194508, 524286, 812840, 1987818, 3486824, 8388606, 12400368, 33348150, 56700072, 128800098, 219681672, 536870910, 861181320, 2147483646, 3555730432

Offset

1,2

Links

Max Alekseyev, Table of n, a(n) for n = 1..39

Formula

a(n) = 2^n - A086328(n).

Crossrefs

Cf. A003473.

Sequence in context: A216762 A132269 A053287 * A336618 A075999 A096999

Adjacent sequences: A086320 A086321 A086322 * A086324 A086325 A086326

Keyword

nonn

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 30 2003

Extensions

More terms from Vladeta Jovovic, Sep 08 2003

More terms from Max Alekseyev, Sep 24 2009

Status

approved