Number of right triangles whose vertices are lattice points in {1,2,...,n} X {1,2,...,n}.
1, 4, 44, 200, 596, 1444, 2960, 5520, 9496, 15332, 23596, 34936, 50020, 69732
2 seqfan posts
Mon Apr 25 12:58:39 CEST 2011 [seqfan] Re: Right Triangle Count on an nXk grid - same effect as rhombuses