A108380 - cp's OEIS frontend

A108380 Least number of distinct n-th roots of unity summing to the smallest possible nonzero magnitude.

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

[1, 1, 1, 1, 2, 1, 2, 3, 2, 3, 5, 5, 6, 6, 4, 5, 5, 5, 7, 7, 10, 5, 8, 7, 12, 7, 10, 9, 14, 13, 11, 7, 14, 11, 17, 9, 18, 14, 18, 9, 19, 12, 17, 15, 14, 14, 22, 15, 16, 20, 20, 17, 18, 22, 23, 17, 24, 19, 26, 21, 29, 18, 26, 19, 26, 31, 30, 27, 31, 17, 32, 23, 34]

cp's OEIS Frontend

A108380 Least number of distinct n-th roots of unity summing to the smallest possible nonzero magnitude.

Table of values

List of values

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

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

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