189373

Appears in sequences

• Triangle read by rows, T(n,k) = Sum_{j=0..n-k+1} j!*C(n-1,j-1)*T(n-j,k-1) if k != 0 else 1, n>=0, 0<=k<=n.at n=39A256895
• Number of GL-racks of order n, up to isomorphism.at n=8A383145