a(n) = (15*n)!*n!/((8*n)!*(5*n)!*(3*n)!).A295467a(n) = (15*n)!*n!/((8*n)!*(5*n)!*(3*n)!).Terms a(0) =1a(1) =45045a(2) =9704539845External referencesoeis: A295467