G.f.: A(x) = Sum_{n>=0} x^(n^2) / Product_{k=1..n} (1 - x^k)^n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =6a(7) =9a(8) =15a(9) =22a(10) =34a(11) =50a(12) =78a(13) =119a(14) =188a(15) =295a(16) =466a(17) =728a(18) =1134a(19) =1742a(20) =2659a(21) =4018a(22) =6037a(23) =9018a(24) =13443a(25) =19993a(26) =29749a(27) =44274a(28) =65976a(29) =98372