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A069405
Half the number of n X 5 binary arrays with a path of adjacent 1's and a path of adjacent 0's from top row to bottom row.
3
15, 285, 4541, 66579, 944157, 13182673, 182702967, 2522968803, 34777826197, 478971480223, 6593672923115, 90751017499077, 1248904863846397, 17186379018703213, 236498372271010941, 3254365880309197587, 44781833050605593997, 616220311429717310963
OFFSET
1,1
LINKS
CROSSREFS
Cf. 1 X n A000225, 2 X n A016269, 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: A249960 A249961 A177074 * A125055 A160397 A303653
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 22 2002
EXTENSIONS
More terms from Sean A. Irvine, Aug 19 2024
STATUS
approved