A069400 Half the number of 7 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

1, 1219, 587031, 182702967, 44515781333

Offset

2,2

Links

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

Crossrefs

Cf. 1 X n A000225, 2 X n A016269, 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: A252600 A293479 A031781 * A233660 A015279 A179140

Adjacent sequences: A069397 A069398 A069399 * A069401 A069402 A069403

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved