id:A147509 - 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 11110-01111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 3, 5, 9, 15, 23, 53, 159, 467, 1455, 4183, 13257, 47381, 210539, 963601, 4871497, 24721415, 137844971, 829467103, 5811222331 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.1.1.0` `.0.0.1.1.1.1.0.1` `.0.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.0` `.1.0.1.1.1.1.0.0` `.0.1.1.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A118403 A033498 A147493 this_sequence A057259 A045599 A045604` `Adjacent sequences: A147506 A147507 A147508 this_sequence A147510 A147511 A147512`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research