A140178 - OEIS

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A140178

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

1, 4, 32, 427, 7396, 130612, 2097152, 30417025, 409957616, 5282779354 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A191459 A184359 A005172 * A088991 A009668 A005121` `Adjacent sequences: A140175 A140176 A140177 * A140179 A140180 A140181`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Jun 15 2008`

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Last modified February 15 07:18 EST 2012. Contains 205702 sequences.