id:A146039 - 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 2X4 tee 1,1 1,2 1,3 2,3 1,4 in any orientation.

+0
1

1, 1, 1, 1, 9, 13, 45, 103, 3815, 10121, 444625, 1564307, 156192449, 708716121, 155685558737, 926098788583, 445436128809681, 3444294518750191, 3885959472155218673, 39161185591962243237, 94947827514803095335545 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.1.0.0.0.0.0.0.1` `.1.1.0.0.0.0.1.1` `.1.0.0.0.0.0.0.1` `.1.0.0.0.0.0.0.1` `.0.0.1.0.0.1.0.0` `.0.0.1.0.0.1.0.0` `.0.1.1.0.0.1.1.0` `.0.0.1.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A068984 A146016 A146128 this_sequence A099580 A166662 A108748` `Adjacent sequences: A146036 A146037 A146038 this_sequence A146040 A146041 A146042`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

AT&T Labs Research