A368816 - cp's OEIS frontend

A368816 Irregular table read by rows: T(n,k) is the number of k-gons, k>=3, in a regular 2n-gon when all vertices are connect by straight lines except for the n lines joining diametrically opposite vertices.

n	a(n)
1	0
2	0
3	1
4	12
5	0
6	0
7	1
8	40
9	8
10	8
11	0
12	0
13	1
14	100
15	40
16	20
17	10
18	0
19	0
20	0
21	1
22	204
23	132
24	12
25	12
26	0
27	0
28	0
29	0
30	0
31	1
32	378
33	280
34	126
35	28
36	0
37	0
38	0
39	0
40	0
41	0
42	0
43	1
44	688
45	528
46	176
47	96
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	1
58	1188
59	864
60	72
61	54
62	36
63	0
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	1

[0, 0, 1, 12, 0, 0, 1, 40, 8, 8, 0, 0, 1, 100, 40, 20, 10, 0, 0, 0, 1, 204, 132, 12, 12, 0, 0, 0, 0, 0, 1, 378, 280, 126, 28, 0, 0, 0, 0, 0, 0, 0, 1, 688, 528, 176, 96, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1188, 864, 72, 54, 36, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A368816 Irregular table read by rows: T(n,k) is the number of k-gons, k>=3, in a regular 2n-gon when all vertices are connect by straight lines except for the n lines joining diametrically opposite vertices.

Table of values

List of values