id:A141483 - OEIS Search Results

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

+0
1

1, 2, 1, 5, 2, 35, 5, 314, 35, 6427, 314, 202841, 6427, 12727570, 202841, 1355115601, 12727570, 269718819131, 1355115601, 94707789944544, 269718819131, 60711713670028729, 94707789944544, 69645620389200894313 (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: A030400 A115345 A140165 this_sequence A104731 A105728 A120095` `Adjacent sequences: A141480 A141481 A141482 this_sequence A141484 A141485 A141486`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Aug 09 2008`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

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