47068domain: NAppears in sequencesNumber of n X n binary arrays with all ones connected only either as two by three or three by two blocks.at n=7A146152Number of isosceles right triangles on a 2n X (n+1) grid.at n=12A189894Subsets of {1,2,...,n-6} without differences equal to 3 or 6.at n=32A224810