Number of ways to arrange 3 indistinguishable points on an n X n X n triangular grid so that no three points are collinear at any angle.

A194131

Number of ways to arrange 3 indistinguishable points on an n X n X n triangular grid so that no three points are collinear at any angle.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =17a(4) =105a(5) =407a(6) =1216a(7) =3036a(8) =6696a(9) =13428a(10) =25005a(11) =43861a(12) =73277a(13) =117471a(14) =181880a(15) =273268a(16) =399960a(17) =572076a(18) =801825a(19) =1103625a(20) =1494541a(21) =1994387a(22) =2626152a(23) =3416300a(24) =4395148a(25) =5596992a(26) =7060737a(27) =8830137a(28) =10954197a(29) =13487527

External references