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A069446 Half the number of n X 8 binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row. 0
128, 330752, 276246170, 138031237058 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..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: A283926 A016831 A103348 * A227605 A016879 A227661

Adjacent sequences:  A069443 A069444 A069445 * A069447 A069448 A069449

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002.

STATUS

approved

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Last modified October 19 14:45 EDT 2019. Contains 328223 sequences. (Running on oeis4.)