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A086866
Third column of A059450.
2
0, 0, 5, 17, 50, 136, 352, 880, 2144, 5120, 12032, 27904, 64000, 145408, 327680, 733184, 1630208, 3604480, 7929856, 17367040, 37879808, 82313216, 178257920, 384827392, 828375040, 1778384896, 3808428032, 8136949760, 17347641344
OFFSET
0,3
LINKS
C. Coker, Enumerating a class of lattice paths, Discrete Math., 271 (2003), 13-28.
FORMULA
For n>1, a(n) = (n^2+9n-2)*2^(n-4). - Ralf Stephan, May 10 2004
MATHEMATICA
LinearRecurrence[{6, -12, 8}, {0, 0, 5, 17, 50}, 30] (* Harvey P. Dale, Jun 13 2016 *)
CROSSREFS
Sequence in context: A147260 A273688 A146045 * A054452 A196310 A196283
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Sep 16 2003
EXTENSIONS
More terms from Ray Chandler, Sep 17 2003
STATUS
approved