6834212520

Appears in sequences

• Triangle, read by rows, where T(n,k) = Sum_{i=k..n-1} T(n-1,i)*T(i+1,k+1) for n>k with T(n,n) = n+1 for n>=0.at n=36A152541
• Column 0 of triangle A152541.at n=8A152542