0,2

Table of n, a(n) for n=0..69.

Conjectures from Colin Barker, Jan 30 2016: (Start)

a(n) = a(n-1)+a(n-3)-a(n-4) for n>4.

G.f.: x*(2+x-3*x^2+3*x^3-x^5-x^6) / ((1-x)^2*(1+x+x^2)).

(End)

Cf. A267181.

Sequence in context: A128214 A307865 A219695 * A248092 A145105 A140700

Adjacent sequences: A267183 A267184 A267185 * A267187 A267188 A267189

nonn

N. J. A. Sloane, Jan 17 2016

approved