OFFSET
0,2
FORMULA
Conjectures from Colin Barker, Apr 10 2020: (Start)
G.f.: (1 + x + x^2 + x^3 + x^4)*(1 + x^2 + 2*x^3 + x^4 + x^6) / ((1 - x)^7*(1 + x)^3*(1 + x + x^2)^2).
a(n) = 2*a(n-1) + 2*a(n-2) - 4*a(n-3) - 4*a(n-4) + 2*a(n-5) + 9*a(n-6) - 9*a(n-8) - 2*a(n-9) + 4*a(n-10) + 4*a(n-11) - 2*a(n-12) - 2*a(n-13) + a(n-14) for n>13.
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Apr 08 2020
STATUS
approved