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A163013
Number of nX4 binary arrays with all 1s connected and a path of 1s from top row to lower right corner
1
4, 44, 469, 4776, 48047, 482895, 4854639, 48809845, 490753552, 4934223120, 49610514652, 498802509247, 5015145456885, 50424133267633, 506982946384063, 5097394665460444, 51251097416909895, 515297550767237152
OFFSET
1,1
LINKS
FORMULA
Empirical: a(n)= 15*a(n-1) -59*a(n-2) +97*a(n-3) -19*a(n-4) -210*a(n-5) +222*a(n-6) +22*a(n-7) -113*a(n-8) +7*a(n-9) -71*a(n-10) +13*a(n-11) +a(n-12). [From R. J. Mathar, Aug 11 2009]
CROSSREFS
Sequence in context: A105038 A002278 A112897 * A087813 A342346 A082779
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 20 2009
STATUS
approved