A069434 - OEIS

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A069434

Half the number of 8 X n binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

0

127, 31376, 7578952, 1806753034, 427585649578

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

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: A238995 A069408 A289474 * A175633 A175825 A217914

Adjacent sequences: A069431 A069432 A069433 * A069435 A069436 A069437

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved