id:A145862 - 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 two by two blocks.

+0
1

1, 2, 1, 2, 2, 5, 3, 12, 6, 32, 16, 104, 49, 441, 169, 2087, 742, 12047, 3848, 83725, 23784, 695140, 176890, 6907583, 1574720, 82485542, 16764539, 1176502867, 214487123, 20130478473 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`Maximal 7 X 7 example` `.0.0.0.0.0.0.0` `.0.1.1.0.1.1.0` `.0.1.1.0.1.1.0` `.0.0.0.0.0.0.0` `.0.1.1.0.1.1.0` `.0.1.1.0.1.1.0` `.0.0.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A079318 A050315 A128978 this_sequence A058701 A004559 A095291` `Adjacent sequences: A145859 A145860 A145861 this_sequence A145863 A145864 A145865`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 22 2008`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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