299260

Appears in sequences

• Number of ways of seating n people around a table for the second time without anyone sitting next to the same person as they did the first time.at n=10A089222
• The number of ways of seating n people around a table for the second time so that k pairs are maintained. T(n,k) read by rows.at n=55A326390
• Triangle read by rows: T(n,k) is the number of permutations of k elements from [1..n] in a circle where adjacent values cannot be consecutive modulo n, rotations are distinct.at n=65A338849