G.f.: A(x) = 1+x*(1+x*(1+x*(...(1+x*(...)^(-n) )...)^-3)^-2)^-1.
A121587
G.f.: A(x) = 1+x*(1+x*(1+x*(...(1+x*(...)^(-n) )...)^-3)^-2)^-1.
Terms
- a(0) =1a(1) =1a(2) =-1a(3) =3a(4) =-14a(5) =87a(6) =-672a(7) =6202a(8) =-66622a(9) =817205a(10) =-11278833a(11) =173092010a(12) =-2925096344a(13) =53989582136
External references
- oeis: A121587