id:A139008 - OEIS Search Results

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Number of x X n symmetric binary matrices containing no more than three 1s in any 2 X 2 sub-block.

+0
1

1, 2, 7, 49, 648, 16475, 801489, 74700792, 13333992705, 4558747755857, 2985167883475040, 3743977846899435969, 8993695705522239110137, 41379357418095833391759776, 364644672948881035681654421967 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), May 31 2008, Table of n, a(n) for n = 0..23`
	CROSSREFS	`Sequence in context: A119668 A101538 A045598 this_sequence A058721 A086902 A138737` `Adjacent sequences: A139005 A139006 A139007 this_sequence A139009 A139010 A139011`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), May 31 2008`

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

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