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A199005 Number of inequivalent cocyclic Hadamard matrices of order 4n. 3
1, 1, 1, 5, 3, 16, 6, 100, 35 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
REFERENCES
P. O'Cathain and M. Roeder, The Cocyclic Hadamard matrices of order less than 40, Des. Codes Cryptogr. 58 (1) (2011) 73-88.
LINKS
V. Alvarez, J. A. Armario, M. D. Frau, and F. Gudlel, The maximal determinant of cocyclic (-1, 1)-matrices over D_{2t}, Linear Algebra and its Applications, 2011, Volume 436, Issue 4, 15 February 2012, Pages 858-873.
CROSSREFS
Sequence in context: A189237 A301494 A053371 * A217415 A213571 A185880
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Nov 01 2011
STATUS
approved

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Last modified April 22 02:54 EDT 2024. Contains 371887 sequences. (Running on oeis4.)