G.f.: (1-2*x+2*x^2-x^3+x^4-x^5+2*x^6-2*x^7+x^8)/((1-x)^2*(1-x^2)*(1-x^3)*(1-x^6)).

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =4a(5) =5a(6) =11a(7) =11a(8) =20a(9) =25a(10) =35a(11) =44a(12) =63a(13) =73a(14) =99a(15) =120a(16) =150a(17) =180a(18) =226a(19) =261a(20) =320a(21) =374a(22) =442a(23) =512a(24) =605a(25) =686a(26) =800a(27) =910a(28) =1040a(29) =1175