-24309domain: ZAppears in sequencesG.f.: Sum_{n=-oo..+oo} x^n * (1 - x^n)^(3*n).at n=51A268298a(n) = Sum_{k=0..floor(n/9)} (-1)^k*binomial(n,9*k).at n=17A307045First term of n-th difference sequence of (floor(k*r)), r = sqrt(6), k >= 0.at n=17A325670First term of n-th difference sequence of (floor(Pi*k/4)), k >= 0.at n=17A325743