OFFSET
0,3
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
C. Coker, Enumerating a class of lattice paths, Discrete Math., 271 (2003), 13-28.
Index entries for linear recurrences with constant coefficients, signature (6,-12,8).
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
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Sep 16 2003
EXTENSIONS
More terms from Ray Chandler, Sep 17 2003
STATUS
approved