A371377 - cp's OEIS frontend

A371377 Irregular table read by rows: place n equally spaced points around the circumference of a circle and then, for each pair of points, draw two distinct circles, whose radii are the same as the first circle, such that both points lie on their circumferences. T(n,k), k>=2, gives the number of vertices formed by the crossing of k arcs.

n	a(n)
1	0
2	0
3	0
4	4
5	0
6	4
7	10
8	10
9	0
10	5
11	6
12	6
13	0
14	6
15	1
16	98
17	35
18	0
19	0
20	0
21	7
22	104
23	32
24	0
25	0
26	0
27	8
28	369
29	81
30	0
31	0
32	0
33	0
34	0
35	10
36	410
37	80
38	0
39	0
40	0
41	0
42	0
43	10
44	1034
45	165
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	11
54	768
55	84
56	0
57	0
58	36
59	0
60	0
61	0
62	0
63	12
64	1
65	2288
66	286
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	13
77	2464
78	280
79	0
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	14

[0, 0, 0, 4, 0, 4, 10, 10, 0, 5, 6, 6, 0, 6, 1, 98, 35, 0, 0, 0, 7, 104, 32, 0, 0, 0, 8, 369, 81, 0, 0, 0, 0, 0, 10, 410, 80, 0, 0, 0, 0, 0, 10, 1034, 165, 0, 0, 0, 0, 0, 0, 0, 11, 768, 84, 0, 0, 36, 0, 0, 0, 0, 12, 1, 2288, 286, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, 2464, 280, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14]

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