54160

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=45A177248
• Number of (1+1) X (n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=15A250878
• Expansion of e.g.f. log(1 - log(1 - x)/(1 - x)).at n=9A300491
• Number of permutations of [n] having exactly three adjacent 2-cycles.at n=12A370529