0,2

Table of n, a(n) for n=0..72.

E. Angelini, k-chunks sum and division by k, post to the SeqFan list, Mar 22 2013

a(n) = 2 a(n-3) - a(n-6).

G.f. (1 + 2*x + 3*x^2 + 2*x^3 + x^4 + 3*x^5)/((1 - x)*(1 + x + x^2))^2.

Cf. A222256, A222258 - A222261.

Sequence in context: A323136 A273285 A068795 * A238535 A072501 A092975

Adjacent sequences: A222254 A222255 A222256 * A222258 A222259 A222260

nonn

Eric Angelini and M. F. Hasler, Mar 23 2013

approved