A366485 - cp's OEIS frontend

A366485 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 edges in the resulting planar graph.

n	a(n)
0	3
1	9
2	48
3	237
4	684
5	1962
6	3630
7	7617
8	12654
9	21114
10	31170
11	50280
12	66687
13	99342
14	132756
15	174567
16	222495
17	302553
18	367158
19	479226
20	579057
21	705432
22	846477
23	1055679
24	1217541
25	1460205
26	1715088
27	2011161
28	2289753
29	2729301
30	3044637
31	3561606
32	4037604
33	4587153
34	5175597
35	5865729
36	6432138
37	7327737

[3, 9, 48, 237, 684, 1962, 3630, 7617, 12654, 21114, 31170, 50280, 66687, 99342, 132756, 174567, 222495, 302553, 367158, 479226, 579057, 705432, 846477, 1055679, 1217541, 1460205, 1715088, 2011161, 2289753, 2729301, 3044637, 3561606, 4037604, 4587153, 5175597, 5865729, 6432138, 7327737]

cp's OEIS Frontend

A366485 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 edges in the resulting planar graph.

Table of values

List of values