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A118995
Number of real n X n symmetric (+1,-1) matrices with positive permanent.
3
1, 4, 32, 592, 11904, 1192384, 134217728
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..7.
CROSSREFS
Cf.
A086900
,
A118994
,
A118999
.
Sequence in context:
A219149
A013041
A006024
*
A222829
A134087
A132854
Adjacent sequences:
A118992
A118993
A118994
*
A118996
A118997
A118998
KEYWORD
nonn
,
more
AUTHOR
Giovanni Resta
, May 08 2006
STATUS
approved
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Last modified September 15 14:02 EDT 2024. Contains 375938 sequences. (Running on oeis4.)