OFFSET
0,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
A. Burstein and T. Mansour, Words restricted by 3-letter generalized multipermutation patterns, Annals. Combin., 7 (2003), 1-14. See Th. 3.6, case k=4.
Index entries for linear recurrences with constant coefficients, signature (9,-30,46,-34,13,-2)
MATHEMATICA
CoefficientList[Series[(1-x)^5/((-1+4x-3x^2+x^3)(1-3x+x^2)(-1+2x)), {x, 0, 30}], x] (* or *) LinearRecurrence[{9, -30, 46, -34, 13, -2}, {1, 4, 16, 60, 215, 747}, 30] (* Harvey P. Dale, May 20 2015 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jan 18 2004
STATUS
approved