id:A146622 - 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 1001-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 3, 5, 11, 17, 31, 67, 255, 681, 2579, 7475, 30835, 113699, 646479, 2916183, 18956135, 100069407, 770834039, 4965697461, 47266430445, 367691554109, 4176001047493, 38902939183671 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.0.0.1.0.0` `.0.0.1.1.1.1.0.0` `.1.1.0.0.0.0.1.1` `.0.1.0.0.0.0.1.0` `.0.1.0.0.0.0.1.0` `.1.1.0.0.0.0.1.1` `.0.0.1.1.1.1.0.0` `.0.0.1.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A108542 A006450 A085918 this_sequence A124179 A124173 A091610` `Adjacent sequences: A146619 A146620 A146621 this_sequence A146623 A146624 A146625`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research