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Search: id:A086323
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| A086323 |
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Number of n X n circulant invertible (0,1) matrices over the reals. |
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+0
5
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| 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)
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OFFSET
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1,2
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FORMULA
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a(n) = 2^n - A086328(n) [From Max Alekseyev (maxale(AT)gmail.com), Sep 24 2009]
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CROSSREFS
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Cf. A003473.
Sequence in context: A020696 A132269 A053287 this_sequence A075999 A096999 A019199
Adjacent sequences: A086320 A086321 A086322 this_sequence A086324 A086325 A086326
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KEYWORD
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nonn
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AUTHOR
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Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 30 2003
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EXTENSIONS
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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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