158447domain: NAppears in sequencesNumber of sensed planar maps with n edges and without loops or parallel edges.at n=11A006394Numbers n such that n | 9^n + 8^n + 7^n + 6^n + 5^n + 4^n + 3^n + 2^n.at n=11A057284Values A such that p=prime(n) satisfies binomial(2p-1, p-1) == 1 + A*p (mod p^4).at n=22A260209