87825

Appears in sequences

• Number of potential flows in 3 X 3 array with integer velocities in -n..n, i.e., number of 3 X 3 arrays with adjacent elements differing by no more than n, counting arrays differing by a constant only once.at n=2A068744
• Number of potential flows in n X n array with integer velocities in -2..2, i.e., number of n X n arrays with adjacent elements differing by no more than 2, counting arrays differing by a constant only once.at n=2A068749
• Number of permutations of length n that avoid the patterns 132, 4321.at n=33A116701
• a(n) = n*(6*n^2 + 15*n + 5)/2.at n=30A163833