A140179 - OEIS

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A140179

Half the number of n X n symmetric binary matrices with adjacent rows differing in at most four positions.

1, 4, 32, 512, 14513, 603485, 29856303, 1487335683, 68719476736, 2898212537994 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A102557 A144935 A153511 * A118990 A036442 A127945` `Adjacent sequences: A140176 A140177 A140178 * A140180 A140181 A140182`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Jun 15 2008`

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.