G.f.: Sum_{n>=0} x^n / (1-x)^(n^3).

Terms

a(0) =1a(1) =1a(2) =2a(3) =10a(4) =65a(5) =564a(6) =6191a(7) =82050a(8) =1295263a(9) =23764278a(10) =499547080a(11) =11892550569a(12) =317112508944