Expansion of g.f. 1/((1-2x)(1-3x)(1-5x)).

Terms

a(0) =1a(1) =10a(2) =69a(3) =410a(4) =2261a(5) =11970a(6) =61909a(7) =315850a(8) =1598421a(9) =8050130a(10) =40425749a(11) =202656090a(12) =1014866581a(13) =5079099490a(14) =25409813589a(15) =127092049130a(16) =635589254741