id:A139018 - OEIS Search Results

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Number of n X n symmetric binary matrices containing no more than eight 1s in any 3 X 3 sub-block.

+0
1

1, 2, 8, 63, 993, 31272, 1966528, 246968879, 61940593841, 31024191508984, 31032570052707008, 61990776975991833569, 247302484619089362603617, 1970252768237692185884064992, 31347829801520384863039736050304 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), May 31 2008, Table of n, a(n) for n = 0..19`
	CROSSREFS	`Sequence in context: A084279 A153526 A153554 this_sequence A052707 A059862 A005612` `Adjacent sequences: A139015 A139016 A139017 this_sequence A139019 A139020 A139021`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), May 31 2008`

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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.

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