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A119010 Number of symmetric n X n (+1,-1)-matrices over the reals with zero permanent. 2
0, 4, 0, 192, 8960, 371200, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..7.

CROSSREFS

Cf. A086906, A088672, A118990, A118993.

Sequence in context: A298447 A138734 A265596 * A255018 A176050 A099841

Adjacent sequences:  A119007 A119008 A119009 * A119011 A119012 A119013

KEYWORD

nonn,more

AUTHOR

Giovanni Resta, May 08 2006

STATUS

approved

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Last modified August 9 04:30 EDT 2020. Contains 336319 sequences. (Running on oeis4.)