A237529 - cp's OEIS frontend

A237529 Number of ways to choose 4 points in an n X n X n triangular grid so that no 3 of them form a 2 X 2 X 2 subtriangle.

n	a(n)
3	6
4	156
5	1191
6	5565
7	19620
8	57351
9	146391
10	336951
11	714555
12	1417515
13	2660196
14	4763226
15	8191911
16	13604220
17	21909810
18	34341666
19	52542036
20	78664446
21	115493685
22	166585755
23	236429886
24	330634821
25	456141681
26	621465825
27	836970225
28	1115172981
29	1471091706
30	1922627616

[6, 156, 1191, 5565, 19620, 57351, 146391, 336951, 714555, 1417515, 2660196, 4763226, 8191911, 13604220, 21909810, 34341666, 52542036, 78664446, 115493685, 166585755, 236429886, 330634821, 456141681, 621465825, 836970225, 1115172981, 1471091706, 1922627616]

cp's OEIS Frontend

A237529 Number of ways to choose 4 points in an n X n X n triangular grid so that no 3 of them form a 2 X 2 X 2 subtriangle.

Table of values

List of values