id:A069442 - OEIS Search Results

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

+0
1

8, 440, 13002, 291782, 5718464, 103948054, 1806753034, 30539121806, 507006229578, 8318320069722, 135401306105052, 2192221953687972 (list; graph; listen)

	OFFSET	`2,1`
	CROSSREFS	`Cf. 2 X n A000079, n X 1 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: A132099 A007701 A101356 this_sequence A013457 A012740 A042525` `Adjacent sequences: A069439 A069440 A069441 this_sequence A069443 A069444 A069445`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhh(AT)cadence.com), Mar 22 2002.`

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.

AT&T Labs Research