809856

Appears in sequences

• Number of derangements of n where minimal cycle size is at least 3.at n=10A038205
• Triangle read by rows: T(n,k) is the number of derangements of {1,2,...,n} having k cycles of length 2 (0 <= k <= floor(n/2)).at n=30A162974
• Triangle read by rows: T(n,k) is the number of permutations of length n that have k same elements at the same positions with its inverse permutation for 0 <= k <= n.at n=55A344901
• Triangle read by rows: T(n,k) is the number of derangements in S_n with no k-cycles. 1 <= k <= n.at n=46A378495