605928domain: NAppears in sequencesNumber of acute isosceles triangles on an n X n grid.at n=27A190317Number of (n+1) X (3+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).at n=10A235012