A069408 Half the number of n X 8 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.

127, 26335, 4461489, 669776139, 94819936513

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: A138128 A267375 A238995 * A289474 A069434 A175633

Adjacent sequences: A069405 A069406 A069407 * A069409 A069410 A069411

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved