id:A069397 - OEIS Search Results

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Half the number of 4 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

+0
1

1, 67, 2427, 66579, 1565371, 33438451, 669776139, 12817737731, 237180629275, 4277806868563, 75628309151275, 1315968756706339, 22606389934281147, 384286142618740851, 6475978445076745163 (list; graph; listen)

	OFFSET	`2,2`
	CROSSREFS	`Cf. 1 X n A000225, 2 X n A016269, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452.` `Sequence in context: A017783 A017730 A078953 this_sequence A103727 A120663 A078989` `Adjacent sequences: A069394 A069395 A069396 this_sequence A069398 A069399 A069400`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhh(AT)cadence.com), Mar 22 2002.`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research