A376931 - cp's OEIS frontend

A376931 Number of points out of n points placed on a circle that can never be reached when starting at one point and then moving clockwise in incrementally increasing steps (first 1, then 2, 3, 4, ...).

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

[0, 0, 1, 0, 2, 2, 3, 0, 5, 4, 5, 4, 6, 6, 9, 0, 8, 10, 9, 8, 13, 10, 11, 8, 14, 12, 16, 12, 14, 18, 15, 0, 21, 16, 23, 20, 18, 18, 25, 16, 20, 26, 21, 20, 33, 22, 23, 16, 27, 28, 33, 24, 26, 32, 37, 24, 37, 28, 29, 36, 30, 30, 47, 0, 44, 42, 33, 32, 45, 46, 35]

cp's OEIS Frontend

A376931 Number of points out of n points placed on a circle that can never be reached when starting at one point and then moving clockwise in incrementally increasing steps (first 1, then 2, 3, 4, ...).

Table of values

List of values

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

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

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