id:A146680 - 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 1100-0111-1100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 9, 20, 33, 56, 137, 404, 1209, 4087, 15733, 60343, 254309, 1153606, 5642466, 31006709, 182836767, 1183007758, 8378875432, 64857203324 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.0.1.0` `.1.1.0.0.1.1.1.0` `.0.1.1.1.0.1.0.0` `.1.1.0.0.0.1.0.0` `.0.0.1.0.0.0.1.1` `.0.0.1.0.1.1.1.0` `.0.1.1.1.0.0.1.1` `.0.1.0.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A059108 A028566 A147479 this_sequence A143704 A128153 A109805` `Adjacent sequences: A146677 A146678 A146679 this_sequence A146681 A146682 A146683`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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

AT&T Labs Research