id:A146069 - 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 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 9, 21, 35, 101, 287, 859, 3329, 15189, 75035, 399377, 2204921, 14787995, 102936591, 860535039, 7743744003, 81593423043, 911784626279 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.1.0.0.0.0.0.1.1` `.1.1.1.0.0.0.1.0` `.0.0.1.0.0.1.1.0` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.0.0` `.0.1.1.0.0.1.0.0` `.0.1.0.0.0.1.1.1` `.1.1.0.0.0.0.0.1`
	CROSSREFS	`Sequence in context: A107978 A043112 A043892 this_sequence A140673 A059993 A036704` `Adjacent sequences: A146066 A146067 A146068 this_sequence A146070 A146071 A146072`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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

AT&T Labs Research