id:A069441 - OEIS Search Results

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Half the number of n X 3 binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

+0
1

4, 84, 1074, 11058, 102448, 896026, 7578952, 62820362, 514178822, 4174954460, 33725176208, 271523097884, 2181288088576, 17498432045552, 140241880816930, 1123280018219562, 8993350007112124 (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: A056400 A119514 A102982 this_sequence A006344 A053352 A024259` `Adjacent sequences: A069438 A069439 A069440 this_sequence A069442 A069443 A069444`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Mar 22 2002.`

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Last modified December 4 20:00 EST 2008. Contains 151309 sequences.

AT&T Labs Research