G.f.: Sum_{k>=1} (k^3 * x^(k^2) / Product_{j=1..k} (1 - x^j)).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =9a(5) =9a(6) =17a(7) =17a(8) =25a(9) =52a(10) =60a(11) =87a(12) =122a(13) =149a(14) =184a(15) =238a(16) =337a(17) =391a(18) =517a(19) =635a(20) =825a(21) =970a(22) =1224a(23) =1433a(24) =1778a(25) =2176a(26) =2585a(27) =3074a(28) =3736a(29) =4414