1365408

Appears in sequences

• Triangle read by rows, T(n, k) = ( ( 6 * Sum_{j=0..k+1} (-1)^j * binomial(n+1, j) * (k-j+1)^n ) - 4 * binomial(n-1, k) ) / 2.at n=48A141696
• Number of 4-turn rook's tours on an n X n board summed over all starting positions.at n=11A187191