A357007 - cp's OEIS frontend

A357007 Number of vertices in an equilateral triangle when n internal equilateral triangles are drawn between the 3n points that divide each side into n+1 equal parts.

n	a(n)
0	3
1	6
2	15
3	30
4	51
5	66
6	111
7	150
8	171
9	246
10	303
11	312
12	435
13	510
14	543
15	678
16	771
17	765
18	975
19	1059
20	1131
21	1326
22	1455
23	1488
24	1731
25	1878
26	1899
27	2178
28	2355
29	2376
30	2703
31	2886
32	2955
33	3270
34	3444
35	3420
36	3891
37	4110
38	4191
39	4485
40	4803
41	4878
42	5295
43	5526
44	5544
45	6078
46	6351
47	6396
48	6915
49	7206
50	7311
51	7794
52	8115

[3, 6, 15, 30, 51, 66, 111, 150, 171, 246, 303, 312, 435, 510, 543, 678, 771, 765, 975, 1059, 1131, 1326, 1455, 1488, 1731, 1878, 1899, 2178, 2355, 2376, 2703, 2886, 2955, 3270, 3444, 3420, 3891, 4110, 4191, 4485, 4803, 4878, 5295, 5526, 5544, 6078, 6351, 6396, 6915, 7206, 7311, 7794, 8115]

cp's OEIS Frontend

A357007 Number of vertices in an equilateral triangle when n internal equilateral triangles are drawn between the 3n points that divide each side into n+1 equal parts.

Table of values

List of values