1,1

Bradley Klee computed a(1)-a(10).

Bradley Klee, Posting to Math Fun Mailing List, Apr 26 2020

Table of n, a(n) for n=1..65.

Conjectures from Colin Barker, May 09 2020: (Start)

G.f.: x*(2 + 2*x - 2*x^2 - 2*x^3 + 7*x^5 + 3*x^6 - 4*x^7 + 10*x^8 - 10*x^9 - 9*x^10 + 14*x^11 - 5*x^13) / ((1 - x)^2*(1 + x)^2).

a(n) = 2*a(n-2) - a(n-4) for n>14.

(End)

Cf. A180001, A334496, A334499-A334515.

Sequence in context: A010671 A339164 A323443 * A291944 A253633 A216844

Adjacent sequences: A334508 A334509 A334510 * A334512 A334513 A334514

nonn

N. J. A. Sloane, May 05 2020

More terms from Jinyuan Wang, May 09 2020

approved