A069393 - OEIS

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A069393

Number of n X 18 binary arrays with a path of adjacent 1's from top row to bottom row.

262143, 68332056247, 17236446198921497, 4144677558181255455025

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

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..4.

CROSSREFS

Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, 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: A075971 A011568 A022534 * A186872 A186881 A186873

Adjacent sequences: A069390 A069391 A069392 * A069394 A069395 A069396

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved