G.f.: 1/((1-t^7)^2*(1-t)*(1-t^3)*(1-t^5)*(1-t^9)*(1-t^11)*(1-t^13)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =3a(6) =4a(7) =6a(8) =7a(9) =9a(10) =12a(11) =14a(12) =18a(13) =22a(14) =28a(15) =33a(16) =40a(17) =48a(18) =57a(19) =68a(20) =80a(21) =96a(22) =111a(23) =130a(24) =151a(25) =175a(26) =202a(27) =233a(28) =269a(29) =306