id:A146157 - 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 either as two by three or three by two blocks.

+0
1

1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 6, 7, 16, 23, 50, 65, 176, 221, 727, 1056, 3742, 5997, 23258, 37914, 168488, 284282, 1460179, 2612520, 15176540, 28767703 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0` `.1.1.1.0.0.1.1.1` `.1.1.1.0.0.1.1.1` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0` `.0.0.0.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A116450 A054172 A121211 this_sequence A048848 A162223 A133076` `Adjacent sequences: A146154 A146155 A146156 this_sequence A146158 A146159 A146160`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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

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