2352000

Appears in sequences

• Let df(n,k) = Product_{i=0..k-1} (n-i) be the descending factorial and let P(m,n) = df(n-1,m-1)^2*(2*n-m)/((m-1)!*m!). Sequence gives P(4,n).at n=16A132458
• G.f. -x*(x-1)*(1+x)/(1-x-12*x^2-x^3+x^4).at n=12A171069
• Irregular triangle T(n,k) = binomial(n-1,m-1)*m!*A036040(n,k), where m=A036043(n,k), read by rows, 1 <= k <= A000041(n).at n=60A181417