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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
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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 July 15 03:33 EDT 2024. Contains 374324 sequences. (Running on oeis4.)