81527040

Appears in sequences

• Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + 2*(k+1)!*Sum_{j=0..k} A(n-1,j)/j! with A(0,k) = 2*(k+1)!, n >= 0, k >= 0.at n=39A379459
• Number of permutations of [n] having the maximal possible number of pairs of integers i<j in [n] such that their cycle minima have opposite sorting order.at n=25A381531