110300domain: NAppears in sequencesNumber of quasi-tetrominoes in an n X n bounding box.at n=11A094171Number of quasi-tetrominoes in an n X n bounding box.at n=16A094171On the Z^2 lattice, number of paths of length 2*p+1 that start at (1,0) and pass through the origin.at n=4A108740