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A036297 Number of Hadamard matrices of order n. 9
1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 5, 0, 0, 0, 3, 0, 0, 0, 60, 0, 0, 0, 487, 0, 0, 0, 13710027, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,17

REFERENCES

See A007299 for references.

LINKS

Table of n, a(n) for n=0..35.

See A007299 for links.

Index entries for sequences related to Hadamard matrices

Index entries for sequences related to maximal determinants

CROSSREFS

A007299 is the main entry for this sequence. Cf. A003432.

Sequence in context: A325967 A229656 A216722 * A336530 A087935 A243829

Adjacent sequences:  A036294 A036295 A036296 * A036298 A036299 A036300

KEYWORD

nonn,nice,hard,more

AUTHOR

N. J. A. Sloane

EXTENSIONS

a(32) from the H. Kharaghani and B. Tayfeh-Rezaie paper. - N. J. A. Sloane, Feb 11 2012

STATUS

approved

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Last modified January 26 07:32 EST 2021. Contains 340434 sequences. (Running on oeis4.)