OFFSET
1,1
COMMENTS
Bradley Klee computed a(1)-a(10).
REFERENCES
Bradley Klee, Posting to Math Fun Mailing List, Apr 26 2020
FORMULA
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)
Conjecture: a(n) = (3 - (-1)^n)*n/2 for n > 10. - Stefano Spezia, Sep 11 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 05 2020
EXTENSIONS
More terms from Jinyuan Wang, May 09 2020
STATUS
approved