A069433 Half the number of 7 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

63, 7616, 896026, 103948054, 11974298030, 1374566625956

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: A251011 A234616 A093263 * A178634 A174763 A160871

Adjacent sequences: A069430 A069431 A069432 * A069434 A069435 A069436

Keyword

nonn

Author

R. H. Hardin, Mar 22 2002

Status

approved