78452649023domain: NAppears in sequencesa(n) = (5*3^(n-1)+1)/2.at n=22A057198a(n) = n*3^(n-1) + (3^n + 1)/2.at n=21A086972a(0)=3, a(n) = 3*a(n-1) + 2*(-1)^n.at n=22A096019a(n) = (5*9^n + 1)/2.at n=11A135423