A069409 Half the number of n X 9 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

255, 111645, 40306317, 12817737731, 3816886269599

Offset

1,1

Links

Table of n, a(n) for n=1..5.

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: A069383 A175824 A238996 * A069435 A221214 A212933

Adjacent sequences: A069406 A069407 A069408 * A069410 A069411 A069412

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved