117586domain: NAppears in sequencesa(n) = 7^n-2^n+1.at n=6A155598a(n) = [x^n] (1/(1 - x/(1 - 2*x/(1 - 3*x/(1 - 4*x/(1 - 5*x/(1 - 6*x/(1 - ...))))))))^n, a continued fraction.at n=6A293470a(n) = 2*3^n - 2^(n-1) (n>=1).at n=9A304168O.g.f. A(x) satisfies: A(x) = 1 + Integral (x/A(x)^5)' / (x/A(x)^9)' dx.at n=6A338163