OFFSET
0,2
FORMULA
Conjectures from Colin Barker, Feb 18 2016: (Start)
a(n) = 8*a(n-2)-12*a(n-4)-16*a(n-6)-4*a(n-8) for n>7.
G.f.: (1+3*x+2*x^2+x^3-2*x^4-10*x^5-2*x^7) / (1-4*x^2-2*x^4)^2.
(End)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved