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A118993 Number of real n X n symmetric (+1,-1) matrices with nonzero permanent. 1
2, 4, 64, 832, 23808, 1725952, 268435456 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A275203 A232444 A088079 * A219735 A279969 A361228
KEYWORD
nonn,more
AUTHOR
Giovanni Resta, May 08 2006
STATUS
approved

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Last modified June 12 18:11 EDT 2024. Contains 373359 sequences. (Running on oeis4.)