OFFSET
0,2
COMMENTS
LINKS
Index entries for linear recurrences with constant coefficients, signature (4, -6, 4, -1).
FORMULA
Conjectures from Colin Barker, Dec 07 2017: (Start)
G.f.: x*(4 + 3*x - 12*x^2 + 6*x^3) / (1 - x )^4.
a(n) = (-36 + 47*n + 12*n^2 + n^3) / 6 for n>0.
a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4) for n>4.
(End)
MATHEMATICA
CROSSREFS
KEYWORD
nonn
AUTHOR
Clark Kimberling, Mar 20 2012
STATUS
approved