id:A147443 - OEIS Search Results

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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-1010 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 13, 23, 73, 316, 1171, 5078, 33627, 212172, 2092051, 17868818, 243014937, 3050949895, 53472938233 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.1.0.0.1.0` `.1.1.1.1.0.1.1.1` `.0.1.0.1.0.0.1.0` `.0.0.0.0.0.1.1.1` `.1.1.1.0.0.0.0.0` `.0.1.0.0.1.0.1.0` `.1.1.1.0.1.1.1.1` `.0.1.0.0.1.0.1.0`
	CROSSREFS	`Sequence in context: A139863 A046862 A155093 this_sequence A131447 A110196 A111943` `Adjacent sequences: A147440 A147441 A147442 this_sequence A147444 A147445 A147446`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.