A216172 - cp's OEIS frontend

A216172 Number of all possible tetrahedra of any size, having reverse orientation to the original regular tetrahedron, formed when intersecting the latter by planes parallel to its sides and dividing its edges into n equal parts.

n	a(n)
1	0
2	0
3	1
4	4
5	10
6	21
7	39
8	66
9	105
10	159
11	231
12	325
13	445
14	595
15	780
16	1005
17	1275
18	1596
19	1974
20	2415
21	2926
22	3514
23	4186
24	4950
25	5814
26	6786
27	7875
28	9090
29	10440
30	11935
31	13585
32	15400
33	17391
34	19569
35	21945
36	24531
37	27339
38	30381
39	33670
40	37219
41	41041
42	45150
43	49560
44	54285
45	59340

[0, 0, 1, 4, 10, 21, 39, 66, 105, 159, 231, 325, 445, 595, 780, 1005, 1275, 1596, 1974, 2415, 2926, 3514, 4186, 4950, 5814, 6786, 7875, 9090, 10440, 11935, 13585, 15400, 17391, 19569, 21945, 24531, 27339, 30381, 33670, 37219, 41041, 45150, 49560, 54285, 59340]

cp's OEIS Frontend

A216172 Number of all possible tetrahedra of any size, having reverse orientation to the original regular tetrahedron, formed when intersecting the latter by planes parallel to its sides and dividing its edges into n equal parts.

Table of values

List of values