id:A146036 - OEIS Search Results

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Number of n X n binary arrays symmetric 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, 11, 17, 43, 77, 281, 645, 3017, 9213, 61533, 218977, 1561879, 6900617, 60762405, 333893691, 3718652761, 25349082469, 352708796463, 2947039725027 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.0.0.0.0.0` `.0.1.0.0.0.1.1.1` `.0.1.1.1.0.1.0.0` `.0.0.0.0.0.1.0.0` `.0.0.1.0.0.0.0.0` `.0.0.1.0.1.1.1.0` `.1.1.1.0.0.0.1.0` `.0.0.0.0.0.0.1.0`
	CROSSREFS	`Sequence in context: A073649 A090609 A144051 this_sequence A046122 A102870 A136721` `Adjacent sequences: A146033 A146034 A146035 this_sequence A146037 A146038 A146039`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research