id:A005312 - OEIS Search Results

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Number of symmetric anti-Hadamard matrices of order n.
(Formerly M2659)

+0
1

1, 3, 7, 16, 46, 138 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).` `R. L. Graham and N. J. A. Sloane, Anti-Hadamard matrices, Linear Alg. Applic., 62 (1984), 113-137.`
	CROSSREFS	`Sequence in context: A058300 A000674 A129045 this_sequence A143817 A000963 A133593` `Adjacent sequences: A005309 A005310 A005311 this_sequence A005313 A005314 A005315`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.