id:A141504 - OEIS Search Results

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Number of n X n binary matrices, symmetric under horizontal and vertical reflection, with no more than 2 ones in any 2 X 2 subblock.

+0
1

1, 2, 1, 11, 7, 195, 85, 8969, 3573, 1232795, 391285, 471487297, 125714303, 516844071813, 113185189874, 1603508113421239, 290842806833709, 14148460147460008963, 2118392163856080466, 354360105981877906958557 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), Aug 10 2008, Table of n, a(n) for n = 0..30`
	CROSSREFS	`Sequence in context: A037916 A143888 A016546 this_sequence A141482 A079795 A052037` `Adjacent sequences: A141501 A141502 A141503 this_sequence A141505 A141506 A141507`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Aug 10 2008`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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