869440

Appears in sequences

• a(n) = (3*n+7)!!!/7!!!.at n=5A051607
• Triangle U, read by rows, where U(n,k) = Product_{j=k..n-1} (3*j+1) for n > k with U(n,n) = 1.at n=39A136214
• a(n) = Product_{k=0..n-1} (2*n+3*k).at n=5A384163