708400

Appears in sequences

• Triangle read by rows: T(n,k) is the number of nonroot nodes of outdegree k (0<=k<=n-1) in all non-crossing trees with n edges.at n=48A100400
• Triangle T(n,k) read by rows: (1/n) * C(2n+k,k-1) * C(n,k); n, k >= 1.at n=42A102537
• Number of (n+1)X(6+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=16A237635
• Triangle read by rows: the reversed x = 1+q Narayana triangle at m=2.at n=38A243662
• Products of primitive roots when n is 2, 4, p^k, or 2p^k (with p an odd prime), for all other n the value is defined to be 1.at n=26A382221