id:A146926 - 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 1001-1111-1001 pattern in any orientation.

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1

1, 1, 1, 3, 3, 5, 9, 17, 89, 140, 1134, 2523, 20495, 73514, 534008, 1996987, 23508472, 92663083, 1862869380, 7762461636, 266742576438, 1312733745392, 59491047519251, 367850100364195, 19425750984998415, 144916187683650857 (list; graph; listen)

	OFFSET	`1,4`
	EXAMPLE	`Maximal 8 X 8 example` `.1.1.1.0.0.1.1.1` `.0.1.0.0.0.0.1.0` `.0.1.0.0.0.0.1.0` `.1.1.1.0.0.1.1.1` `.0.0.0.0.0.0.0.0` `.0.0.1.0.0.1.0.0` `.0.0.1.1.1.1.0.0` `.0.0.1.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A078028 A104220 A137202 this_sequence A000198 A027170 A132775` `Adjacent sequences: A146923 A146924 A146925 this_sequence A146927 A146928 A146929`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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

AT&T Labs Research