OFFSET
0,2
COMMENTS
Linear recurrence and g.f. confirmed by Shutov/Maleev link in A301690. - Ray Chandler, Aug 30 2023
LINKS
Ray Chandler, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (1, 0, 0, 0, 2, -2, 0, 0, 0, -1, 1).
FORMULA
From Chai Wah Wu, Feb 03 2021: (Start)
a(n) = a(n-1) + 2*a(n-5) - 2*a(n-6) - a(n-10) + a(n-11) for n > 10.
G.f.: -(x^2 + x + 1)*(x^8 + 5*x^7 + 4*x^5 + 8*x^4 + 4*x^3 + 5*x + 1)/((x - 1)^3*(x^4 + x^3 + x^2 + x + 1)^2). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Mar 25 2018
STATUS
approved