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A198176
Number of orthogonal cocycles in Z^2(Z^t_2,Z_2).
0
1, 6, 168, 26880
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
REFERENCES
Horadam, K. J., Hadamard matrices and their applications. Princeton University Press, Princeton, NJ, 2007. xiv+263 pp. See p. 132.
LINKS
Table of n, a(n) for n=1..4.
CROSSREFS
Sequence in context: A003720 A306837 A002884 * A264358 A264796 A266852
Adjacent sequences: A198173 A198174 A198175 * A198177 A198178 A198179
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Feb 05 2012
STATUS
approved

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Last modified March 1 01:57 EST 2025. Contains 381294 sequences.
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