id:A146035 - OEIS Search Results

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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 3, 7, 7, 15, 15, 39, 39, 189, 189, 995, 995, 5569, 5569, 37913, 37913, 366061, 366061, 4244909, 4244909, 58320195, 58320195, 974389263, 974389263 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.0.0.1.0.0` `.0.0.1.0.0.1.0.0` `.1.1.1.0.0.1.1.1` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.0.0` `.1.1.1.0.0.1.1.1` `.0.0.1.0.0.1.0.0` `.0.0.1.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A147252 A147104 A147381 this_sequence A147190 A146450 A147144` `Adjacent sequences: A146032 A146033 A146034 this_sequence A146036 A146037 A146038`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research