2127247

Appears in sequences

• a(n) = 2*A010844(n) + 1.at n=7A161370
• 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=37A161380