6050000

Appears in sequences

• a(n) = n^5*(n+1)^2/2.at n=10A163275
• Square array read by antidiagonals: T(m,n) = number of Eulerian circuits in the Cartesian product of two directed cycles of lengths m and n.at n=40A212801
• Row 5 of array in A212801.at n=4A212802
• Number of Eulerian circuits in the Cartesian product of two directed cycles of lengths n.at n=4A212803