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A069398 Half the number of 5 X n binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row. 0
1, 177, 15253, 944157, 48602431, 2230830597, 94819936513, 3816886269599 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..9.

CROSSREFS

Cf. 1 X n A000225, 2 X n A016269, 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: A097317 A052461 A173375 * A189910 A189904 A189160

Adjacent sequences:  A069395 A069396 A069397 * A069399 A069400 A069401

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved

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Last modified September 24 22:46 EDT 2021. Contains 347651 sequences. (Running on oeis4.)