1397520

Appears in sequences

• Permanent of the inverse Hilbert matrix.at n=3A111194
• Number of n X 3 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, with no 2-loops and with no occupancy greater than 2.at n=9A221397
• Number of permutations of [n] having at least one repeated cycle length.at n=10A351901