10747904domain: NAppears in sequencesExpansion of (1 + x - 2*x^2)/(1 - 2*x)^2.at n=19A052951a(n) = - 2*a(n-1) - 8*a(n-3), a(0) = 1, a(1) = 1, a(2) = -2.at n=19A106603Numbers with 38 divisors.at n=11A175747