60104domain: NAppears in sequencesa(n) = a(n-1) + 2*a(n-2) + 3*a(n-3), for n>3, otherwise a(n) = n.at n=14A100550G.f. A(x) satisfies: Sum_{n>=0} x^n*A(x)^n/(1 - x*A(x)^(n+4)) = Sum_{n>=0} x^n*A(x)^(2*n)/(1 - x*A(x)^(3*n+3)).at n=6A350117