Expansion of e.g.f. exp(Sum_{k>=1} x^(k^2) / (k^2)!).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =6a(6) =16a(7) =36a(8) =106a(9) =443a(10) =1796a(11) =6161a(12) =23816a(13) =122266a(14) =643644a(15) =2934296a(16) =14002237a(17) =83835433a(18) =532282819a(19) =3005258539a(20) =17039094646a(21) =115611682810a(22) =848428608644