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Search: id:A086323
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A086323 Number of n X n circulant invertible (0,1) matrices over the reals. +0
5
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 (list; graph; listen)
OFFSET

1,2

FORMULA

a(n) = 2^n - A086328(n) [From Max Alekseyev (maxale(AT)gmail.com), Sep 24 2009]

CROSSREFS

Cf. A003473.

Sequence in context: A020696 A132269 A053287 this_sequence A075999 A096999 A019199

Adjacent sequences: A086320 A086321 A086322 this_sequence A086324 A086325 A086326

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 08 2003

More terms from Max Alekseyev (maxale(AT)gmail.com), Sep 24 2009

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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