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A069379
Number of n X 4 binary arrays with a path of adjacent 1's from top row to bottom row.
5
15, 175, 1985, 22193, 247759, 2764991, 30856705, 344356289, 3842988975, 42887577455, 478623939553, 5341429762353, 59610217019311, 665248512113343, 7424156719466465, 82853403589520257, 924641917817567951
OFFSET
1,1
LINKS
CROSSREFS
Column 4 of A359576.
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: A346947 A346924 A145147 * A184285 A120995 A024197
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2002
STATUS
approved