A216066 - cp's OEIS frontend

A216066 a(n) = card {cos((2^k)Pi/(2n-1)): k in N}.

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

[1, 1, 2, 3, 3, 5, 6, 4, 4, 9, 6, 11, 10, 9, 14, 5, 5, 12, 18, 12, 10, 7, 12, 23, 21, 8, 26, 20, 9, 29, 30, 6, 6, 33, 22, 35, 9, 20, 30, 39, 27, 41, 8, 28, 11, 12, 10, 36, 24, 15, 50, 51, 12, 53, 18, 36, 14, 44, 12, 24, 55, 20, 50, 7, 7, 65, 18, 36, 34, 69, 46]

cp's OEIS Frontend

A216066 a(n) = card {cos((2^k)Pi/(2n-1)): k in N}.

Table of values

List of values

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

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

cp's OEIS Frontend

A216066 a(n) = card {cos((2^k)*Pi/(2*n-1)): k in N}.

Table of values

List of values

A216066 a(n) = card {cos((2^k)Pi/(2n-1)): k in N}.

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