341852

Appears in sequences

• a(n) = n*(n - 1)*(n^2 + 1)/2.at n=29A071252
• Number of self-avoiding planar walks starting at (0,0), ending at (n,0), not extending above the line (x,2x) or below the line (x,-2x), and using steps (0,1), (-1,1), and (1,-1) with the restriction that (-1,1) and (1,-1) are always immediately followed by (0,1).at n=14A328139
• a(n) = Sum_{k=1..floor(n/2)} k^2 * (n-k)^2.at n=28A337173