id:A069404 - OEIS Search Results

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

+0
1

7, 55, 377, 2427, 15253, 94847, 587031, 3625675, 22372413, 137993145, 850987067, 5247512077, 32357022035 (list; graph; listen)

	OFFSET	`1,1`
	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: A014637 A062212 A121183 this_sequence A015564 A070997 A122372` `Adjacent sequences: A069401 A069402 A069403 this_sequence A069405 A069406 A069407`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Mar 22 2002.`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.