303600

Appears in sequences

• Number of nonseparable tree-rooted planar maps with n + 2 edges and 3 vertices.at n=21A006411
• Products of 4 consecutive integers: a(n) = n*(n-1)*(n-2)*(n-3).at n=25A052762
• a(n) = n*(n-1)*(n-2)*(n-3) for n>=5.at n=25A052768
• Eighth column of Catalan triangle A009766.at n=11A064061
• a(n) = 12 * C(2n+1,n-5) / (n+7).at n=7A090749
• Number of arrangements that can be formed by taking n distinct things out of 25.at n=4A104643
• a(n) = 5*a(n-1) + 45*a(n-3) - 225*a(n-4), a(0)=0, a(1)=4, a(2)=24, a(3)=60, a(4)=480.at n=8A112611
• (n^2)*(n^2-1)*(n^2-2)*(n^2-3).at n=5A217574
• Triangle, read by rows, T(n,k) = 2*k*C(2*(n+k),n-k)/(n+k).at n=47A257501
• a(n) = (n-1)*binomial(3*n-2,n)/(2*n-1) + (n+1)*binomial(3*n,n)/(2*n+1) - binomial(3*n-1,n).at n=9A262717
• a(n) = (5*n)!/(4*n+1)!.at n=5A365341
• Positive integers of the form k^2 - 1 that are the product of two other distinct positive integers of the form k^2 - 1.at n=30A372497