106709domain: NAppears in sequencesLeast k such that n^k mod k = n-1.at n=23A128149a(n) = least k such that the remainder when 26^k is divided by k is n.at n=24A128366a(n) is the result of n applications of the function f to n, where f(x) = floor((3*x + 1)/2) (A007494).at n=21A353220