356908domain: NAppears in sequencesa(n) = 3*a(n-1) + 4*a(n-2) + a(n-3), a(0) = 1, a(1) = 1, a(2) = 5.at n=10A321703G.f.: 1/(1-x)^3 * Product_{k>=1} (1 + x^k).at n=39A325951