8508985

Appears in sequences

• Triangle read by rows: T(n,k) = 2*k*T(n-1,n-1) + 1 (n >= 0, 0 <= k <= n), with T(0,0) = 1.at n=40A161380
• Expansion of e.g.f. exp(x)*(1 - x)/(1 - 2*x).at n=8A308876