G.f.: 3F2([2/9, 5/9, 7/9], [2/3, 1], 729 x).A275461G.f.: 3F2([2/9, 5/9, 7/9], [2/3, 1], 729 x).Terms a(0) =1a(1) =105a(2) =38808a(3) =18595500a(4) =10000998000External referencesoeis: A275461