2863311514domain: NAppears in sequencesExpansion of 1/((1-x)*(1-2*x)*(1-x^2)).at n=30A011377Generalized Jacobsthal numbers.at n=32A083579a(n) = 2*(4^n - 1)/3 - n.at n=15A144414Partial sums of floor(2^n/3).at n=31A178420