A069444 - OEIS

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A069444

Half the number of n X 6 binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.

0

32, 12064, 1896074, 200993408, 17550580192, 1374566625956

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

OFFSET

2,1

LINKS

Table of n, a(n) for n=2..7.

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: A004147 A212800 A214387 * A280100 A187240 A062315

Adjacent sequences: A069441 A069442 A069443 * A069445 A069446 A069447

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 22 2002

STATUS

approved