6,3

Alois P. Heinz, Table of n, a(n) for n = 6..10000

G.f.: -(x^4-x^2-1)*x^6/((x^2+1)*(x^2+x+1)*(x+1)^2*(x-1)^4).

Column k=4 of A209318.

Sequence in context: A214583 A232721 A227956 * A225531 A129295 A192276

Adjacent sequences: A320589 A320590 A320591 * A320593 A320594 A320595

nonn,easy

Alois P. Heinz, Oct 16 2018

approved