G.f. A(x) satisfies A(x) = 1/( 1 - 9*x/(1 - x*A(x)) )^(1/3).
A372108
G.f. A(x) satisfies A(x) = 1/( 1 - 9*x/(1 - x*A(x)) )^(1/3).
Terms
- a(0) =1a(1) =3a(2) =21a(3) =174a(4) =1569a(5) =14898a(6) =146541a(7) =1479198a(8) =15231207a(9) =159338433a(10) =1688597850a(11) =18089117742a(12) =195559863960
External references
- oeis: A372108