A117672 - cp's OEIS frontend

A117672 Numbers n such that |cos(n)*cos(n+2)| < (cos(n+1))^2.

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	14
10	15
11	17
12	18
13	21
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	34
22	36
23	37
24	39
25	40
26	43
27	46
28	47
29	49
30	50
31	52
32	53
33	55
34	56
35	58
36	59
37	61
38	62
39	65
40	68
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	81
50	83
51	84
52	87
53	90
54	91
55	93
56	94
57	96
58	97
59	99
60	100
61	102
62	103
63	105
64	106
65	109
66	112
67	113
68	115

[2, 3, 5, 6, 8, 9, 11, 12, 14, 15, 17, 18, 21, 24, 25, 27, 28, 30, 31, 33, 34, 36, 37, 39, 40, 43, 46, 47, 49, 50, 52, 53, 55, 56, 58, 59, 61, 62, 65, 68, 69, 71, 72, 74, 75, 77, 78, 80, 81, 83, 84, 87, 90, 91, 93, 94, 96, 97, 99, 100, 102, 103, 105, 106, 109, 112, 113, 115]

cp's OEIS Frontend

A117672 Numbers n such that |cos(n)*cos(n+2)| < (cos(n+1))^2.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	14
10	15
11	17
12	18
13	21
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	34
22	36
23	37
24	39
25	40
26	43
27	46
28	47
29	49
30	50
31	52
32	53
33	55
34	56
35	58
36	59
37	61
38	62
39	65
40	68
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	81
50	83
51	84
52	87
53	90
54	91
55	93
56	94
57	96
58	97
59	99
60	100
61	102
62	103
63	105
64	106
65	109
66	112
67	113
68	115

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	14
10	15
11	17
12	18
13	21
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	34
22	36
23	37
24	39
25	40
26	43
27	46
28	47
29	49
30	50
31	52
32	53
33	55
34	56
35	58
36	59
37	61
38	62
39	65
40	68
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	81
50	83
51	84
52	87
53	90
54	91
55	93
56	94
57	96
58	97
59	99
60	100
61	102
62	103
63	105
64	106
65	109
66	112
67	113
68	115

n	a(n)
1	2
2	3
3	5
4	6
5	8
6	9
7	11
8	12
9	14
10	15
11	17
12	18
13	21
14	24
15	25
16	27
17	28
18	30
19	31
20	33
21	34
22	36
23	37
24	39
25	40
26	43
27	46
28	47
29	49
30	50
31	52
32	53
33	55
34	56
35	58
36	59
37	61
38	62
39	65
40	68
41	69
42	71
43	72
44	74
45	75
46	77
47	78
48	80
49	81
50	83
51	84
52	87
53	90
54	91
55	93
56	94
57	96
58	97
59	99
60	100
61	102
62	103
63	105
64	106
65	109
66	112
67	113
68	115