OFFSET
0,11
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 1, 0, 0, 0, 0, 0, 0, 1, 1, -1, -1, 0, 0, 0, 0, 0, 0, -1, 0, 1).
FORMULA
a(0)=1, a(1)=0, a(2)=1, a(3)=0, a(4)=1, a(5)=0, a(6)=1, a(7)=0, a(8)=1, a(9)=1, a(10)=2, a(11)=1, a(12)=2, a(13)=1, a(14)=2, a(15)=1, a(16)=2, a(17)=1, a(18)=3, a(19)=2, a(20)=4, a(n)=a(n-2)+a(n-9)+a(n-10)- a(n-11)- a(n-12)-a(n-19)+a(n-21). - Harvey P. Dale, Oct 15 2013
MATHEMATICA
CoefficientList[Series[1/((1-x^2)(1-x^9)(1-x^10)), {x, 0, 80}], x] (* or *) LinearRecurrence[{0, 1, 0, 0, 0, 0, 0, 0, 1, 1, -1, -1, 0, 0, 0, 0, 0, 0, -1, 0, 1}, {1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 2, 4}, 80] (* Harvey P. Dale, Oct 15 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved