A279161 - cp's OEIS frontend

A279161 Define P = e^gamma*loglog(n) and Q = 3/loglog(n), where gamma is Euler's constant A001620. Then a(n) = phi(n) - ceiling(n/(P + Q)), where phi(n) is Euler's function A000010.

n	a(n)
3	1
4	1
5	3
6	1
7	4
8	2
9	4
10	2
11	7
12	1
13	9
14	3
15	4
16	4
17	12
18	2
19	13
20	3
21	7
22	5
23	17
24	2
25	14
26	6
27	12
28	5
29	21
30	1
31	23
32	9
33	12
34	8
35	16
36	4
37	27
38	9
39	15
40	7
41	31
42	2
43	32
44	10
45	14
46	12
47	35
48	5
49	31
50	9
51	20
52	12
53	40
54	6
55	28
56	11
57	23
58	15
59	45
60	3
61	46
62	16
63	22
64	18
65	34
66	5
67	51
68	17
69	29
70	8
71	54
72	8
73	56
74	20
75	23
76	19

[1, 1, 3, 1, 4, 2, 4, 2, 7, 1, 9, 3, 4, 4, 12, 2, 13, 3, 7, 5, 17, 2, 14, 6, 12, 5, 21, 1, 23, 9, 12, 8, 16, 4, 27, 9, 15, 7, 31, 2, 32, 10, 14, 12, 35, 5, 31, 9, 20, 12, 40, 6, 28, 11, 23, 15, 45, 3, 46, 16, 22, 18, 34, 5, 51, 17, 29, 8, 54, 8, 56, 20, 23, 19]

cp's OEIS Frontend

A279161 Define P = e^gamma*loglog(n) and Q = 3/loglog(n), where gamma is Euler's constant A001620. Then a(n) = phi(n) - ceiling(n/(P + Q)), where phi(n) is Euler's function A000010.

Table of values

List of values

n	a(n)
3	1
4	1
5	3
6	1
7	4
8	2
9	4
10	2
11	7
12	1
13	9
14	3
15	4
16	4
17	12
18	2
19	13
20	3
21	7
22	5
23	17
24	2
25	14
26	6
27	12
28	5
29	21
30	1
31	23
32	9
33	12
34	8
35	16
36	4
37	27
38	9
39	15
40	7
41	31
42	2
43	32
44	10
45	14
46	12
47	35
48	5
49	31
50	9
51	20
52	12
53	40
54	6
55	28
56	11
57	23
58	15
59	45
60	3
61	46
62	16
63	22
64	18
65	34
66	5
67	51
68	17
69	29
70	8
71	54
72	8
73	56
74	20
75	23
76	19

n	a(n)
3	1
4	1
5	3
6	1
7	4
8	2
9	4
10	2
11	7
12	1
13	9
14	3
15	4
16	4
17	12
18	2
19	13
20	3
21	7
22	5
23	17
24	2
25	14
26	6
27	12
28	5
29	21
30	1
31	23
32	9
33	12
34	8
35	16
36	4
37	27
38	9
39	15
40	7
41	31
42	2
43	32
44	10
45	14
46	12
47	35
48	5
49	31
50	9
51	20
52	12
53	40
54	6
55	28
56	11
57	23
58	15
59	45
60	3
61	46
62	16
63	22
64	18
65	34
66	5
67	51
68	17
69	29
70	8
71	54
72	8
73	56
74	20
75	23
76	19

n	a(n)
3	1
4	1
5	3
6	1
7	4
8	2
9	4
10	2
11	7
12	1
13	9
14	3
15	4
16	4
17	12
18	2
19	13
20	3
21	7
22	5
23	17
24	2
25	14
26	6
27	12
28	5
29	21
30	1
31	23
32	9
33	12
34	8
35	16
36	4
37	27
38	9
39	15
40	7
41	31
42	2
43	32
44	10
45	14
46	12
47	35
48	5
49	31
50	9
51	20
52	12
53	40
54	6
55	28
56	11
57	23
58	15
59	45
60	3
61	46
62	16
63	22
64	18
65	34
66	5
67	51
68	17
69	29
70	8
71	54
72	8
73	56
74	20
75	23
76	19