A366484 - cp's OEIS frontend

A366484 Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of interior vertices in the resulting planar graph.

n	a(n)
0	0
1	0
2	13
3	96
4	285
5	901
6	1605
7	3534
8	5797
9	9813
10	14319
11	23809
12	30912
13	47154
14	62728
15	82440
16	104493
17	144730
18	173637
19	229948
20	276325
21	336861
22	403383
23	509146
24	582342
25	702150
26	824875
27	969303
28	1098225
29	1321888
30	1463487
31	1724094
32	1952410
33	2221395
34	2505064
35	2846800
36	3103677
37	3556029
38	3978646
39	4443883

[0, 0, 13, 96, 285, 901, 1605, 3534, 5797, 9813, 14319, 23809, 30912, 47154, 62728, 82440, 104493, 144730, 173637, 229948, 276325, 336861, 403383, 509146, 582342, 702150, 824875, 969303, 1098225, 1321888, 1463487, 1724094, 1952410, 2221395, 2505064, 2846800, 3103677, 3556029, 3978646, 4443883]

cp's OEIS Frontend

A366484 Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2*n new points on the other two sides: sequence gives number of interior vertices in the resulting planar graph.

Table of values

List of values