id:A144260 - OEIS Search Results

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Number of symmetric n X n binary matrices with each element equal to one minus the sum of its horizontal and vertical neighbors, modulo two.

+0
1

1, 1, 1, 4, 2, 1, 1, 1, 16, 1, 8, 1, 1, 4, 1, 16, 2, 1, 256, 1, 1, 1, 128, 4, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`1,4`
	COMMENT	`A075462 is a(n) without the symmetry restriction.`
	CROSSREFS	`Sequence in context: A016508 A010312 A068930 this_sequence A036466 A097526 A051149` `Adjacent sequences: A144257 A144258 A144259 this_sequence A144261 A144262 A144263`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Sep 16 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.