id:A147344 - 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 0100-0100-1111-0010-0010 pattern in any orientation.

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1, 1, 1, 1, 1, 1, 1, 1, 3, 15, 29, 45, 73, 153, 491, 1439, 4619, 16351, 52019, 195927, 800019, 3525897, 17183583, 88313479 (list; graph; listen)

	OFFSET	`1,9`
	EXAMPLE	`Maximal 9 X 9 example` `.0.0.1.0.0.0.1.0.0` `.0.0.1.0.1.1.1.0.0` `.1.1.1.1.0.0.1.1.1` `.0.1.0.0.0.0.1.0.0` `.0.1.0.0.0.0.0.1.0` `.0.0.1.0.0.0.0.1.0` `.1.1.1.0.0.1.1.1.1` `.0.0.1.1.1.0.1.0.0` `.0.0.1.0.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A015646 A067144 A018784 this_sequence A053519 A039666 A020493` `Adjacent sequences: A147341 A147342 A147343 this_sequence A147345 A147346 A147347`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

AT&T Labs Research