A163013 Number of nX4 binary arrays with all 1s connected and a path of 1s from top row to lower right corner

4, 44, 469, 4776, 48047, 482895, 4854639, 48809845, 490753552, 4934223120, 49610514652, 498802509247, 5015145456885, 50424133267633, 506982946384063, 5097394665460444, 51251097416909895, 515297550767237152

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n=1..44

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

Adjacent sequences: A163010 A163011 A163012 * A163014 A163015 A163016

Keyword

nonn

Author

R. H. Hardin Jul 20 2009

Status

approved