OFFSET
0,2
FORMULA
a(n) = Sum_{k=0..n} binomial(n,k) * b(k), where g.f. B(x) = Sum_{k>=0} b(k)*x^k satisfies B(x) = (1/x) * Series_Reversion( x*(1-x-x^3) ).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(serreverse(x/(x+1/(1-x-x^3)))/x)
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Mar 02 2024
STATUS
approved