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A069447
Half the number of n X 9 binary arrays with no path of adjacent 1's or adjacent 0's from top row to bottom row.
92
256, 1731840, 3334295986, 3616567402784
OFFSET
2,1
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: A283933 A016832 A103350 * A227606 A016880 A227662
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2002
STATUS
approved