G.f. satisfies: A(x) = Sum_{n>=0} A_n(x) * A(x)^n where A_{n+1}(x) = A_n(A(x)) denotes iteration with A_0(x)=x and A'(0)=1.
A180256
G.f. satisfies: A(x) = Sum_{n>=0} A_n(x) * A(x)^n where A_{n+1}(x) = A_n(A(x)) denotes iteration with A_0(x)=x and A'(0)=1.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =12a(4) =56a(5) =290a(6) =1626a(7) =9735a(8) =61709a(9) =411840a(10) =2882513a(11) =21095851a(12) =161056199a(13) =1280069731a(14) =10572507465a(15) =90590477793a(16) =804013429416
External references
- oeis: A180256