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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. 0
63, 7616, 896026, 103948054, 11974298030, 1374566625956 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 19 13:11 EDT 2019. Contains 324222 sequences. (Running on oeis4.)