id:A146472 - 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 1110-0111 pattern in any orientation.

+0
1

1, 1, 1, 1, 3, 9, 23, 85, 375, 2149, 15299, 129877, 1353943, 17475557, 279267939, 5511590965, 133957241929, 4003924495735, 147542199515841, 6704016396279819, 375798793326385295, 25965634034447375655 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.1.1.0.0.0.0` `.1.0.1.1.1.0.0.0` `.1.1.0.0.0.0.0.0` `.1.1.0.0.0.0.1.0` `.0.1.0.0.0.0.1.1` `.0.0.0.0.0.0.1.1` `.0.0.0.1.1.1.0.1` `.0.0.0.0.1.1.1.0`
	CROSSREFS	`Sequence in context: A018334 A146392 A147508 this_sequence A145955 A129834 A029488` `Adjacent sequences: A146469 A146470 A146471 this_sequence A146473 A146474 A146475`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research