G.f.: Product_{i>0} 1/(Sum_{j>=0} (-1)^j*j!*x^(j*i)).

A293259

G.f.: Product_{i>0} 1/(Sum_{j>=0} (-1)^j*j!*x^(j*i)).

Terms

    a(0) =1a(1) =1a(2) =0a(3) =5a(4) =-13a(5) =75a(6) =-465a(7) =3509a(8) =-29492a(9) =276310a(10) =-2854776a(11) =32242512a(12) =-395295109a(13) =5230184477a(14) =-74303722489

External references