id:A147215 - 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 1100-0111-0011 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 17, 41, 71, 215, 773, 2523, 9517, 44347, 255961, 1482711, 8989887, 64060215, 492775957, 4232478379 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.1.0` `.1.0.0.1.1.1.0.0` `.1.1.0.1.1.0.0.0` `.0.1.1.0.0.1.1.0` `.0.1.1.0.0.1.1.0` `.0.0.0.1.1.0.1.1` `.0.0.1.1.1.0.0.1` `.0.1.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A087658 A078655 A052279 this_sequence A126790 A089200 A004625` `Adjacent sequences: A147212 A147213 A147214 this_sequence A147216 A147217 A147218`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.