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%I #9 Dec 28 2015 09:32:48
%S 1,2,6,8,30,36,126,160,450,740,2046,2592,8190,12824,30030,48640,
%T 131070,194508,524286,812840,1987818,3486824,8388606,12400368,
%U 33348150,56700072,128800098,219681672,536870910,861181320,2147483646,3555730432
%N Number of n X n circulant invertible (0,1) matrices over the reals.
%H Max Alekseyev, <a href="/A086323/b086323.txt">Table of n, a(n) for n = 1..39</a>
%F a(n) = 2^n - A086328(n).
%Y Cf. A003473.
%K nonn
%O 1,2
%A Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 30 2003
%E More terms from _Vladeta Jovovic_, Sep 08 2003
%E More terms from _Max Alekseyev_, Sep 24 2009