A069432 Half the number of 6 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

31, 1810, 102448, 5718464, 317229344, 17550580192

Offset

1,1

Links

Table of n, a(n) for n=1..6.

Crossrefs

Cf. 2 X n A000079, n X 1 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: A185665 A183883 A049081 * A338533 A055629 A131751

Adjacent sequences: A069429 A069430 A069431 * A069433 A069434 A069435

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved