G.f. F_1(x) satisfies: x = Sum_{n>=1} F_{n}(x)^n, where the n-th iteration of the g.f. is defined by: F_{n}(x) = F_{n-1}( F_1(x) ) with F_0(x) = x.
A171780
G.f. F_1(x) satisfies: x = Sum_{n>=1} F_{n}(x)^n, where the n-th iteration of the g.f. is defined by: F_{n}(x) = F_{n-1}( F_1(x) ) with F_0(x) = x.
Terms
- a(0) =1a(1) =-1a(2) =3a(3) =-12a(4) =55a(5) =-273a(6) =1431a(7) =-7837a(8) =44726a(9) =-266381a(10) =1658300a(11) =-10768609a(12) =72407500a(13) =-498510748a(14) =3477131466a(15) =-24461950817a(16) =174793982029
External references
- oeis: A171780