id:A145999 - 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 3X3 plus 2,1 2,2 2,3 1,2 3,2.

+0
1

1, 1, 2, 1, 2, 1, 7, 2, 23, 5, 132, 12, 836, 51, 8563, 317, 115954, 2654, 2274857, 30351, 60964251, 489559, 2304941344, 11104536, 120886008663, 350752586, 8909697213591, 15493779226, 915528841065256, 954798521885 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.0.0.0.1.0` `.1.1.1.0.0.1.1.1` `.0.1.0.0.0.0.1.0` `.0.0.0.0.0.0.0.0` `.0.0.0.0.0.0.0.0` `.0.1.0.0.0.0.1.0` `.1.1.1.0.0.1.1.1` `.0.1.0.0.0.0.1.0`
	CROSSREFS	`Sequence in context: A057568 A046749 A016543 this_sequence A011128 A146003 A066772` `Adjacent sequences: A145996 A145997 A145998 this_sequence A146000 A146001 A146002`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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

AT&T Labs Research