20970481

Appears in sequences

• Triangle of numbers {a(n,k), n >= 0, 0<=k<=n} defined by a(0,0)=1, a(n,0)=a(n-1,n-1), a(n,k)=a(n,k-1) + Sum_{i=0..k-1} a(n-1,i).at n=37A108041
• Antidiagonal sums of the convolution array A213762.at n=20A213764