id:A146424 - 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 1010-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 3, 13, 35, 165, 727, 4597, 49361, 536263, 7236179, 123419355, 2560850455, 72571417743, 2591027414559, 113550328451315, 6265506511430339, 433231100847867929 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.0.0.0` `.0.0.0.0.1.0.0.0` `.0.0.0.1.1.0.0.0` `.1.0.1.0.1.0.1.1` `.1.1.1.1.0.0.0.1` `.0.0.0.0.0.0.1.1` `.0.0.0.1.0.1.0.1` `.0.0.0.1.1.1.1.0`
	CROSSREFS	`Sequence in context: A108480 A146741 A146725 this_sequence A146049 A061483 A128288` `Adjacent sequences: A146421 A146422 A146423 this_sequence A146425 A146426 A146427`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research