-11319domain: ZAppears in sequencesa(n) = Sum_{k=0..floor(n/7)} (-1)^k*binomial(n,7*k).at n=16A307041First term of n-th difference sequence of (floor(k*r)), r = sqrt(1/3), k >= 0.at n=15A325730First term of n-th difference sequence of (floor(e*k/(e-1))), k >= 0.at n=15A325749