440840359

Properties

Appears in sequences

• Triangle read by rows: T(n,k) is the number of permutations of [n] having k adjacent transpositions (0 <= k <= floor(n/2)). An adjacent transposition is a cycle of the form (i, i+1).at n=42A177248
• Number of permutations of [n] having no adjacent transpositions, that is, no cycles of the form (i, i+1).at n=12A177249
• Prime numbersat n=23392938