id:A146010 - 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 3X3 tee 1,1 1,2 1,3 2,2 3,2 in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 2, 5, 10, 17, 41, 113, 371, 1287, 4551, 19076, 90597, 483533, 2906704, 18699832, 136658284, 1121369297, 10362476826, 106541327541, 1220122346197, 15486094270737, 222171208299640, 3540873297034591, 63467027877319177 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.0.0.0.0` `.0.0.0.1.1.1.0.0` `.0.0.0.1.0.0.1.0` `.1.1.1.0.0.0.1.0` `.0.1.0.0.0.1.1.1` `.0.1.0.0.1.0.0.0` `.0.0.1.1.1.0.0.0` `.0.0.0.0.1.0.0.0`
	CROSSREFS	`Sequence in context: A146220 A054964 A057752 this_sequence A077631 A025223 A104688` `Adjacent sequences: A146007 A146008 A146009 this_sequence A146011 A146012 A146013`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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

AT&T Labs Research