id:A146220 - 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 101-111-010 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 2, 5, 10, 17, 34, 85, 281, 955, 3256, 11436, 47842, 229549, 1285142, 7367162, 46939349, 319959201, 2574706386, 22549841306, 223885431121, 2344970886285, 27997518161136, 360114867911637, 5365975270644628 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.0.1.0.0` `.0.0.0.1.1.1.0.0` `.0.0.0.0.1.0.1.1` `.1.1.0.0.0.1.1.0` `.0.1.1.0.0.0.1.1` `.1.1.0.1.0.0.0.0` `.0.0.1.1.1.0.0.0` `.0.0.1.0.1.0.0.0`
	CROSSREFS	`Sequence in context: A038358 A107482 A018315 this_sequence A054964 A057752 A146010` `Adjacent sequences: A146217 A146218 A146219 this_sequence A146221 A146222 A146223`
	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