id:A141514 - OEIS Search Results

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Number of n X n binary matrices, symmetric under 180 degree rotation, with no more than 3 ones in any 2 X 2 subblock.

+0
1

1, 2, 3, 29, 176, 5621, 122557, 14694960, 1181467639, 516777127561, 152237306877120, 244601068560037129, 264412894413046723521, 1557984885076079288613088, 6177872087977594821120364739 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), Aug 10 2008, Table of n, a(n) for n = 0..20`
	CROSSREFS	`Sequence in context: A053998 A144953 A064893 this_sequence A078727 A076977 A109886` `Adjacent sequences: A141511 A141512 A141513 this_sequence A141515 A141516 A141517`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Aug 10 2008`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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