E.g.f.: Product_{m>0} (1+x^m+x^(2*m)/2!+x^(3*m)/3!).

A293195

E.g.f.: Product_{m>0} (1+x^m+x^(2*m)/2!+x^(3*m)/3!).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =13a(4) =72a(5) =500a(6) =4020a(7) =37380a(8) =389760a(9) =4546080a(10) =58363200a(11) =814968000a(12) =12301027200a(13) =200216016000

External references