1169280

Appears in sequences

• a(n) = 8*(n-1)*(n-2)*(n-3)*(6*n^2-37*n+60).at n=9A134241
• Number of ordered pairs of permutation functions (f,g) on n elements satisfying f(x) = f(g(g(x))).at n=7A239840
• Irregular triangle read by rows: T(n,k) is the number of arrangements of n labeled children with exactly k rounds; n >= 2, 1 <= k <= floor(n/2).at n=22A349280
• Table read by rows: T(n, k) = A124320(n + 1, k) * A132393(n, k).at n=31A368583
• Triangle read by rows: T(n, k) = [x^k] Sum_{j=0..n} FallingFactorial(n, j)*RisingFactorial(x, j).at n=43A391008