OFFSET
0,2
COMMENTS
Computed by Davide M. Proserpio using ToposPro, Apr 01 2019
LINKS
Rémy Sigrist, Table of n, a(n) for n = 0..1000
FORMULA
Conjectures from Colin Barker, Apr 05 2019: (Start)
G.f.: (1 + 3*x + 6*x^2 + 6*x^3 + 10*x^4 + 12*x^5 + 12*x^6 + 18*x^7 + 7*x^8 + 6*x^10 + 3*x^11 + 12*x^12 + 12*x^13 - 12*x^16 - 6*x^17) / ((1 - x)^3*(1 + x)^2*(1 + x^2)^2).
a(n) = a(n-1) + 2*a(n-4) - 2*a(n-5) - a(n-8) + a(n-9) for n>17.
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 02 2019
EXTENSIONS
More terms from Rémy Sigrist, Apr 04 2019
STATUS
approved