Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996.

A061144

Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996.

Terms

    a(0) =0a(1) =2a(2) =70a(3) =764a(4) =4718a(5) =20658a(6) =71616a(7) =209752a(8) =540416a(9) =1259050a(10) =2704494a(11) =5433420a(12) =10320054a(13) =18688026a(14) =32478032a(15) =54460064a(16) =88495536a(17) =139857842a(18) =215617062a(19) =325102172a(20) =480442174a(21) =697204602a(22) =995133456a(23) =1399002496a(24) =1939589056

External references