77384

Appears in sequences

• Number of 4 X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.at n=16A086114
• T(n,k)=Number of n-turn queen's tours on a kXk board summed over all starting positions.at n=32A186965
• Number of 5-turn queen's tours on an n X n board summed over all starting positions.at n=3A186968
• a(n) = n! * Sum_{k=1..n} ( Sum_{d|k} (-1)^(k/d+1) * d^2 )/(k * (n-k)!).at n=6A354508