id:A141482 - OEIS Search Results

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Number of n X n binary matrices, symmetric under horizontal reflection, with no more than 1 one in any 2 X 2 subblock.

+0
1

1, 2, 1, 11, 8, 269, 85, 16334, 5933, 4005785, 817280, 2758179839, 505375405, 6795928721858, 826573277157, 51247532773412135, 4982395765808506, 1302848440978689378895, 90454037365096154821 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), Aug 09 2008, Table of n, a(n) for n = 0..30`
	CROSSREFS	`Sequence in context: A143888 A016546 A141504 this_sequence A079795 A052037 A038586` `Adjacent sequences: A141479 A141480 A141481 this_sequence A141483 A141484 A141485`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Aug 09 2008`

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

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