G.f.: (x^2+6*x^3+7*x^4+8*x^5+4*x^6-3*x^8-2*x^9-x^10) / ((1-x)^2*(1-x^2)^3*(1-x^3)^4*(1-x^4)).

Terms

a(0) =0a(1) =0a(2) =1a(3) =8a(4) =25a(5) =72a(6) =175a(7) =384a(8) =778a(9) =1492a(10) =2701a(11) =4704a(12) =7891a(13) =12828a(14) =20280a(15) =31312a(16) =47265a(17) =70000a(18) =101836a(19) =145792a(20) =205663a(21) =286284a(22) =393520a(23) =534816a(24) =719117a(25) =957408a(26) =1262909a(27) =1651640a(28) =2142476a(29) =2758212