3,2

Alois P. Heinz, Table of n, a(n) for n = 3..1000

Conjectures from Colin Barker, Dec 11 2018: (Start)

G.f.: x^3*(1 + 3*x + 5*x^2) / ((1 - x)^2*(1 + x)*(1 + x + x^2)).

a(n) = a(n-2) + a(n-3) - a(n-5) for n>7.

(End)

Column k=3 of A242887.

Sequence in context: A021278 A336761 A143940 * A083349 A065230 A316478

Adjacent sequences: A321770 A321771 A321772 * A321774 A321775 A321776

nonn

Alois P. Heinz, Nov 18 2018

approved