4259571domain: NAppears in sequencesG.f. A(x) satisfies: A(x*G098618(x)) = G098618(x), where G098618 is the g.f. for A098618(n) = A007482(n)*Catalan(n).at n=11A098619Numbers whose arithmetic derivative is equal to Euler totient function: n' = phi(n).at n=10A166374Numbers k such that A345048(k) is equal to A345049(k).at n=14A345051