A069451 - OEIS

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A069451

Half the number of 6 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.

31, 10123, 1389619, 127780201, 9622763387

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,1

LINKS

Table of n, a(n) for n=2..6.

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: A119598 A139295 A261947 * A374668 A073099 A245571

Adjacent sequences: A069448 A069449 A069450 * A069452 A069453 A069454

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved