A069450 Half the number of 5 X n binary arrays with no path of adjacent 1's or adjacent 0's from top to bottom or side to side.

15, 1723, 95783, 3802615, 127780201, 3912171001

Offset

2,1

Links

Table of n, a(n) for n=2..7.

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: A195891 A195521 A122184 * A205346 A208868 A070862

Adjacent sequences: A069447 A069448 A069449 * A069451 A069452 A069453

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved