G.f.: Sum_{k>=0} x^k * Product_{j=1..6*k} (1 + x^j).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =10a(7) =14a(8) =18a(9) =23a(10) =30a(11) =38a(12) =48a(13) =60a(14) =74a(15) =91a(16) =112a(17) =137a(18) =166a(19) =202a(20) =244a(21) =294a(22) =352a(23) =420a(24) =500a(25) =592a(26) =700a(27) =824a(28) =968a(29) =1133