124256domain: NAppears in sequencesNumber of different values obtained by evaluating all different parenthesizations of 1/2/3/4/.../n.at n=22A078389Numbers n such that 2 * (1^n + 2^n + 3^n + ... + n^n) is not 0 (mod n), but 2 * (1^d + 2^d + 3^d + ... + d^d) is 0 (mod d) for each other d | n.at n=33A280187