id:A146621 - OEIS Search Results

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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 5, 13, 33, 131, 465, 2505, 18109, 137539, 1253575, 13645721, 177302103, 2859333451, 55979477433, 1308550606345, 36559028261121, 1227152834528187, 49674730440765147, 2427381380225360097 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.1.1.0.0` `.0.0.1.0.0.1.0.0` `.1.1.0.0.1.0.0.1` `.1.0.0.0.1.1.1.1` `.1.0.1.1.0.0.0.0` `.1.1.0.1.0.0.0.0` `.0.0.0.1.0.0.0.0` `.0.0.1.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A027051 A109786 A055426 this_sequence A147086 A032406 A146917` `Adjacent sequences: A146618 A146619 A146620 this_sequence A146622 A146623 A146624`
	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