id:A145863 - 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 two by two blocks.

+0
1

1, 2, 1, 2, 2, 7, 7, 22, 24, 108, 150, 786, 1301, 8045, 15509, 116985, 273970, 2472105, 6959192, 74864863, 250693524, 3242639202, 13050355068, 202176993015, 975396539666, 18089511084508, 104443510575847, 2322049495419469 (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: A093655 A023140 A145859 this_sequence A110775 A092186 A138262` `Adjacent sequences: A145860 A145861 A145862 this_sequence A145864 A145865 A145866`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 22 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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