Number of non-equivalent (mod D_3) ways to choose three points in an n X n X n triangular grid so that they do not form a 2 X 2 X 2 subtriangle.

A237530

Number of non-equivalent (mod D_3) ways to choose three points in an n X n X n triangular grid so that they do not form a 2 X 2 X 2 subtriangle.

Terms

    a(0) =0a(1) =4a(2) =22a(3) =82a(4) =231a(5) =566a(6) =1216a(7) =2410a(8) =4428a(9) =7712a(10) =12780a(11) =20392a(12) =31409a(13) =47032a(14) =68594a(15) =97878a(16) =136836a(17) =187998a(18) =254100a(19) =338602a(20) =445213a(21) =578524a(22) =743424a(23) =945860a(24) =1192126a(25) =1489768a(26) =1846734a(27) =2272430a(28) =2776725a(29) =3371170

External references