id:A147455 - OEIS Search Results

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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11000-01111-11000 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 9, 19, 53, 174, 577, 2638, 14887, 91688, 621981, 4953292, 45339549, 483440905, 6106017477, 89757755470, 1517774827657, 29582954137388 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.1.1` `.0.0.0.1.1.1.1.0` `.0.0.1.0.0.0.1.1` `.0.0.1.0.0.0.0.0` `.0.0.1.0.0.0.0.0` `.0.1.1.1.0.0.0.0` `.0.1.0.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A147477 A146677 A077442 this_sequence A146429 A018316 A146605` `Adjacent sequences: A147452 A147453 A147454 this_sequence A147456 A147457 A147458`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

AT&T Labs Research