[seqfan] Re: No. of sign-nonsingular matrices
N. J. A. Sloane
njas at research.att.com
Fri Mar 27 02:44:56 CET 2009
Eric, doesn't A = [-1] also work?
For then |A| = , per |A| = 1 = |det A|,
so a(1) = 3 not 2 ?
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