225860

Appears in sequences

• a(n) = T(2n,n-2), T given by A026747.at n=7A026750
• Triangle read by rows: T(n,0)=1, T(n,n)=1, T(n, k) = 2*(n-k)*T(n-1, k-1) + 2*k*T(n-1, k).at n=47A099759
• Triangle read by rows: T(n,0)=1, T(n,n)=1, T(n, k) = 2*(n-k)*T(n-1, k-1) + 2*k*T(n-1, k).at n=52A099759