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A118992 Number of real n X n invertible symmetric (+1,-1) matrices. 1
2, 4, 32, 512, 16896, 1190144, 163899904 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
CROSSREFS
Sequence in context: A134958 A101460 A304862 * A012509 A062740 A336832
KEYWORD
nonn,more
AUTHOR
Giovanni Resta, May 08 2006
STATUS
approved

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Last modified June 22 15:57 EDT 2024. Contains 373590 sequences. (Running on oeis4.)