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

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 * A073099 A245571 A074218

Adjacent sequences: A069448 A069449 A069450 * A069452 A069453 A069454

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved