id:A146064 - OEIS Search Results

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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 49, 91, 755, 1733, 17237, 43939, 2178205, 7075949, 921596877, 3869156215, 535678119399, 2790029976011, 707504525942961, 4543722915142743, 2950922408069540377, 23782316720866894839, 30573780517964151258947 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.0.0` `.1.0.0.0.0.0.0.1` `.1.1.1.0.0.1.1.1` `.0.0.1.0.0.1.0.0` `.0.0.0.0.0.0.0.0` `.1.0.0.0.0.0.0.1` `.1.1.1.0.0.1.1.1` `.0.0.1.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A020158 A084632 A020176 this_sequence A031180 A039427 A043250` `Adjacent sequences: A146061 A146062 A146063 this_sequence A146065 A146066 A146067`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

AT&T Labs Research