A069420 - OEIS

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A069420

Number of 6 X n binary arrays with a path of adjacent 1's and no path of adjacent 0's from top row to bottom row.

1, 237, 28159, 2575297, 206458895

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

OFFSET

1,2

LINKS

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

CROSSREFS

Cf. 2 X n A001047, n X 2 A034182, 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: A237592 A256805 A192283 * A205068 A229077 A129124

Adjacent sequences: A069417 A069418 A069419 * A069421 A069422 A069423

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved