id:A147087 - OEIS Search Results

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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 10001-11111 pattern in any orientation.

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1

1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 9, 15, 27, 43, 124, 355, 1029, 2971, 10017, 31249, 124044, 490643, 2352059, 10915093, 60936189, 323565841, 2097402227 (list; graph; listen)

	OFFSET	`1,9`
	EXAMPLE	`Maximal 9 X 9 example` `.0.0.1.0.0.0.1.0.0` `.0.0.1.1.1.1.1.0.0` `.1.1.0.0.0.0.0.1.1` `.0.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1.0` `.1.1.0.0.0.0.0.1.1` `.0.0.1.1.1.1.1.0.0` `.0.0.1.0.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A034084 A018342 A029485 this_sequence A140190 A083658 A018436` `Adjacent sequences: A147084 A147085 A147086 this_sequence A147088 A147089 A147090`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

AT&T Labs Research