A248355 - cp's OEIS frontend

A248355 Least k such that Pi - k*sin(Pi/k) < 1/(2n).

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

[4, 5, 6, 7, 8, 8, 9, 10, 10, 11, 11, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 27]

cp's OEIS Frontend

A248355 Least k such that Pi - k*sin(Pi/k) < 1/(2n).

Table of values

List of values

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

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

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