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A118988
Number of different values taken by the permanent of a symmetric real (+1,-1)-matrix of order n.
3
1, 2, 2, 4, 7, 15, 20, 62, 190, 771, 2073
(list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..10.
Minfeng Wang, C++ program.
CROSSREFS
Cf. A087983, A118987, A118986.
Cf. A006125 (number of symmetric real (+1,-1)-matrices of order (n-1)).
Sequence in context: A300353 A049868 A120363 * A049904 A049906 A014265
Adjacent sequences: A118985 A118986 A118987 * A118989 A118990 A118991
KEYWORD
nonn,more,changed
AUTHOR
Giovanni Resta, May 08 2006
EXTENSIONS
a(8)-a(9) from Minfeng Wang, Jun 20 2024
a(0)=1 prepended by Alois P. Heinz, Jun 21 2024
a(10) from Minfeng Wang, Sep 21 2024
STATUS
approved

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Last modified September 28 11:26 EDT 2024. Contains 376292 sequences.
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