id:A146056 - OEIS Search Results

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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X3 U in any orientation.

+0
1

1, 1, 1, 1, 5, 1, 21, 9, 145, 29, 1925, 153, 28297, 2069, 734141, 42313, 33360929, 973281, 2205341673, 38746505, 212529048997, 2736250609, 33748456381053, 283141781389, 8526059147670681, 43072398238613, 3258206098233834291 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.0.0` `.1.0.1.0.0.1.0.1` `.1.1.1.0.0.1.1.1` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.0.0` `.1.1.1.0.0.1.1.1` `.1.0.1.0.0.1.0.1` `.0.0.0.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A126325 A095368 A029757 this_sequence A101625 A051929 A167572` `Adjacent sequences: A146053 A146054 A146055 this_sequence A146057 A146058 A146059`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research