id:A145958 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a zee 1,1 1,2 2,2 2,3 in any orientation.

+0
1

1, 1, 1, 1, 1, 9, 19, 37, 135, 441, 1879, 9853, 53945, 336895, 2463469, 20551403, 200816385, 2276422523, 29317863291, 437152357559, 7466970790985, 147328291419831, 3346732661121193 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.0.0.1.1.0` `.1.1.0.1.1.0.1.1` `.1.0.1.0.1.1.0.0` `.0.1.1.0.0.0.1.0` `.0.1.0.0.0.1.1.0` `.0.0.1.1.0.1.0.1` `.1.1.0.1.1.0.1.1` `.0.1.1.0.0.0.1.0`
	CROSSREFS	`Sequence in context: A051811 A034056 A157034 this_sequence A039299 A159697 A014005` `Adjacent sequences: A145955 A145956 A145957 this_sequence A145959 A145960 A145961`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 25 2008`

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

AT&T Labs Research