G.f. A(x) equals the limit of the composition of functions (x+x^n) in reverse order; let F_1(x) = x, F_{n+1}(x) = F_n(x) + F_n(x)^(n+1), then A(x) = limit F_n(x): A(x) = ...o x+x^n o ... o x+x^3 o x+x^2 o x.
A119471
G.f. A(x) equals the limit of the composition of functions (x+x^n) in reverse order; let F_1(x) = x, F_{n+1}(x) = F_n(x) + F_n(x)^(n+1), then A(x) = limit F_n(x): A(x) = ...o x+x^n o ... o x+x^3 o x+x^2 o x.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =8a(5) =17a(6) =50a(7) =146a(8) =399a(9) =1087a(10) =3042a(11) =8741a(12) =25509a(13) =75259a(14) =223529a(15) =665215a(16) =1983226a(17) =5931158a(18) =17800505a(19) =53627756a(20) =162206221a(21) =492399027a(22) =1499501067a(23) =4579193127a(24) =14017819056a(25) =43001141630a(26) =132154209754a(27) =406818719006
External references
- oeis: A119471