A069405 Half the number of n X 5 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

15, 285, 4541, 66579, 944157, 13182673, 182702967, 2522968803, 34777826197

Offset

1,1

Links

Table of n, a(n) for n=1..9.

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: A249960 A249961 A177074 * A125055 A160397 A303653

Adjacent sequences: A069402 A069403 A069404 * A069406 A069407 A069408

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved