152692domain: NAppears in sequencesSum of n-th antidiagonal of array in A081998.at n=37A082001G.f.: (1-2*x^2)/(1-x-2*x^2-x^3).at n=17A108122a(n)= +a(n-3) +2*a(n-6) +a(n-9).at n=47A109531Number of binary strings of length n with no substrings equal to 000, 001, or 010.at n=30A164316