G.f. A(x) satisfies A(x) = ( 1 + x*A(x)^2/(1 + x*A(x)) )^3.
A378891
G.f. A(x) satisfies A(x) = ( 1 + x*A(x)^2/(1 + x*A(x)) )^3.
Terms
- a(0) =1a(1) =3a(2) =18a(3) =142a(4) =1278a(5) =12429a(6) =127223a(7) =1350456a(8) =14729628a(9) =164079982a(10) =1858781652a(11) =21348787587a(12) =248021665720
External references
- oeis: A378891