142695domain: NAppears in sequencesNumber of permutations of n elements containing a 2-cycle.at n=9A027616Numbers k such that {k + 2, k + 4} and {k^3 + 2, k^3 + 4} are twin prime pairs.at n=28A284058Triangle T(n,k) is the number of permutations on n elements with at least one k-cycle for 1 <= k <= n.at n=37A293211