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A069418
Number of 4 X n binary arrays with a path of adjacent 1's and no path of adjacent 0's from top row to bottom row.
0
1, 39, 907, 17339, 300651, 4927163, 77892523, 1201461339
OFFSET
1,2
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: A293918 A264458 A004330 * A194477 A016091 A028227
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2002
STATUS
approved