id:A069449 - OEIS Search Results

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Half the number of 4 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.

+0
1

7, 269, 5799, 95783, 1389619, 18772467, 243194821, 3070812013 (list; graph; listen)

	OFFSET	`2,1`
	CROSSREFS	`Cf. 2 X n A000225, 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: A129423 A048291 A015089 this_sequence A140031 A066413 A037067` `Adjacent sequences: A069446 A069447 A069448 this_sequence A069450 A069451 A069452`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Mar 22 2002.`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.