G.f.: A(x) = exp( Sum_{n>=1} A179115(n)*x^n/n ), where A179115(n) = Sum_{d|n} phi(d^tau(d)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =19a(6) =103a(7) =131a(8) =515a(9) =777a(10) =2183a(11) =3387a(12) =92950a(13) =98220a(14) =215084a(15) =407878a(16) =1321714a(17) =1941644a(18) =10099460a(19) =13008998a(20) =49257496a(21) =74663830a(22) =209907775a(23) =326405877a(24) =5955260642a(25) =6463849558a(26) =14769440215a(27) =27326857279a(28) =88012522809