189208

Appears in sequences

• Number of ways to place 4 nonattacking grasshoppers on a chessboard of size n x n.at n=6A190396
• E.g.f.: arcsin(x) o x/(1-x) o sin(x), a composition of functions involving sin(x) and its inverse.at n=7A200560
• Number of (n+2)X(6+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=13A253508