OFFSET
0,5
LINKS
FORMULA
From Chai Wah Wu, Mar 07 2021: (Start)
a(n) = 2*a(n-1) - 2*a(n-2) + a(n-3) for n > 4.
G.f.: x^2*(-4*x^2 + 2*x - 1)/((x - 1)*(x^2 - x + 1)). (End)
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
STATUS
approved