A364830 - cp's OEIS frontend

A364830 a(n) is the number of line intersections (not coinciding with a vertex) inside a regular n-gon after inscribing (always starting from the same point), for each proper divisor d_i of n greater than 1, a regular d_i-gon.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	9
13	0
14	1
15	4
16	0
17	0
18	8
19	0
20	11
21	4
22	1
23	0
24	29
25	0
26	1
27	0
28	11
29	0
30	43
31	0
32	0
33	4
34	1
35	8
36	50
37	0
38	1
39	4
40	39
41	0
42	49
43	0
44	11
45	24
46	1
47	0
48	73
49	0
50	12
51	4
52	11
53	0
54	33
55	8
56	43
57	4
58	1
59	0
60	193
61	0
62	1
63	28
64	0
65	8
66	57
67	0
68	11
69	4
70	71
71	0
72	164
73	0
74	1
75	28
76	11
77	12
78	61

[0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 9, 0, 1, 4, 0, 0, 8, 0, 11, 4, 1, 0, 29, 0, 1, 0, 11, 0, 43, 0, 0, 4, 1, 8, 50, 0, 1, 4, 39, 0, 49, 0, 11, 24, 1, 0, 73, 0, 12, 4, 11, 0, 33, 8, 43, 4, 1, 0, 193, 0, 1, 28, 0, 8, 57, 0, 11, 4, 71, 0, 164, 0, 1, 28, 11, 12, 61]

cp's OEIS Frontend

A364830 a(n) is the number of line intersections (not coinciding with a vertex) inside a regular n-gon after inscribing (always starting from the same point), for each proper divisor d_i of n greater than 1, a regular d_i-gon.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	9
13	0
14	1
15	4
16	0
17	0
18	8
19	0
20	11
21	4
22	1
23	0
24	29
25	0
26	1
27	0
28	11
29	0
30	43
31	0
32	0
33	4
34	1
35	8
36	50
37	0
38	1
39	4
40	39
41	0
42	49
43	0
44	11
45	24
46	1
47	0
48	73
49	0
50	12
51	4
52	11
53	0
54	33
55	8
56	43
57	4
58	1
59	0
60	193
61	0
62	1
63	28
64	0
65	8
66	57
67	0
68	11
69	4
70	71
71	0
72	164
73	0
74	1
75	28
76	11
77	12
78	61

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	9
13	0
14	1
15	4
16	0
17	0
18	8
19	0
20	11
21	4
22	1
23	0
24	29
25	0
26	1
27	0
28	11
29	0
30	43
31	0
32	0
33	4
34	1
35	8
36	50
37	0
38	1
39	4
40	39
41	0
42	49
43	0
44	11
45	24
46	1
47	0
48	73
49	0
50	12
51	4
52	11
53	0
54	33
55	8
56	43
57	4
58	1
59	0
60	193
61	0
62	1
63	28
64	0
65	8
66	57
67	0
68	11
69	4
70	71
71	0
72	164
73	0
74	1
75	28
76	11
77	12
78	61

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	1
7	0
8	0
9	0
10	1
11	0
12	9
13	0
14	1
15	4
16	0
17	0
18	8
19	0
20	11
21	4
22	1
23	0
24	29
25	0
26	1
27	0
28	11
29	0
30	43
31	0
32	0
33	4
34	1
35	8
36	50
37	0
38	1
39	4
40	39
41	0
42	49
43	0
44	11
45	24
46	1
47	0
48	73
49	0
50	12
51	4
52	11
53	0
54	33
55	8
56	43
57	4
58	1
59	0
60	193
61	0
62	1
63	28
64	0
65	8
66	57
67	0
68	11
69	4
70	71
71	0
72	164
73	0
74	1
75	28
76	11
77	12
78	61