159732

Appears in sequences

• a(n) = T(n,n), array T given by A047858.at n=13A036542
• Number of ways to place 3 nonattacking grasshoppers on a chessboard of size n x n.at n=9A190395
• Number of nX5 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 3 neighboring 1s.at n=5A296393
• Number of nX6 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 3 neighboring 1s.at n=4A296394
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 3 neighboring 1s.at n=49A296396
• T(n,k)=Number of nXk 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 3 neighboring 1s.at n=50A296396
• a(n) = (2*n^3 - 6*n^2 + 19*n - 9)*n/6.at n=26A378023