A331176 - cp's OEIS frontend

A331176 a(n) = n - n/gcd(n, phi(n)), where phi is Euler totient function.

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	3
7	0
8	6
9	6
10	5
11	0
12	9
13	0
14	7
15	0
16	14
17	0
18	15
19	0
20	15
21	14
22	11
23	0
24	21
25	20
26	13
27	24
28	21
29	0
30	15
31	0
32	30
33	0
34	17
35	0
36	33
37	0
38	19
39	26
40	35
41	0
42	35
43	0
44	33
45	30
46	23
47	0
48	45
49	42
50	45
51	0
52	39
53	0
54	51
55	44
56	49
57	38
58	29
59	0
60	45
61	0
62	31
63	56
64	62
65	0
66	33
67	0
68	51
69	0
70	35
71	0
72	69
73	0
74	37
75	60
76	57
77	0
78	65
79	0
80	75
81	78
82	41
83	0
84	77
85	0
86	43
87	0
88	77
89	0
90	75

[0, 0, 0, 2, 0, 3, 0, 6, 6, 5, 0, 9, 0, 7, 0, 14, 0, 15, 0, 15, 14, 11, 0, 21, 20, 13, 24, 21, 0, 15, 0, 30, 0, 17, 0, 33, 0, 19, 26, 35, 0, 35, 0, 33, 30, 23, 0, 45, 42, 45, 0, 39, 0, 51, 44, 49, 38, 29, 0, 45, 0, 31, 56, 62, 0, 33, 0, 51, 0, 35, 0, 69, 0, 37, 60, 57, 0, 65, 0, 75, 78, 41, 0, 77, 0, 43, 0, 77, 0, 75]

cp's OEIS Frontend

A331176 a(n) = n - n/gcd(n, phi(n)), where phi is Euler totient function.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	3
7	0
8	6
9	6
10	5
11	0
12	9
13	0
14	7
15	0
16	14
17	0
18	15
19	0
20	15
21	14
22	11
23	0
24	21
25	20
26	13
27	24
28	21
29	0
30	15
31	0
32	30
33	0
34	17
35	0
36	33
37	0
38	19
39	26
40	35
41	0
42	35
43	0
44	33
45	30
46	23
47	0
48	45
49	42
50	45
51	0
52	39
53	0
54	51
55	44
56	49
57	38
58	29
59	0
60	45
61	0
62	31
63	56
64	62
65	0
66	33
67	0
68	51
69	0
70	35
71	0
72	69
73	0
74	37
75	60
76	57
77	0
78	65
79	0
80	75
81	78
82	41
83	0
84	77
85	0
86	43
87	0
88	77
89	0
90	75

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	3
7	0
8	6
9	6
10	5
11	0
12	9
13	0
14	7
15	0
16	14
17	0
18	15
19	0
20	15
21	14
22	11
23	0
24	21
25	20
26	13
27	24
28	21
29	0
30	15
31	0
32	30
33	0
34	17
35	0
36	33
37	0
38	19
39	26
40	35
41	0
42	35
43	0
44	33
45	30
46	23
47	0
48	45
49	42
50	45
51	0
52	39
53	0
54	51
55	44
56	49
57	38
58	29
59	0
60	45
61	0
62	31
63	56
64	62
65	0
66	33
67	0
68	51
69	0
70	35
71	0
72	69
73	0
74	37
75	60
76	57
77	0
78	65
79	0
80	75
81	78
82	41
83	0
84	77
85	0
86	43
87	0
88	77
89	0
90	75

n	a(n)
1	0
2	0
3	0
4	2
5	0
6	3
7	0
8	6
9	6
10	5
11	0
12	9
13	0
14	7
15	0
16	14
17	0
18	15
19	0
20	15
21	14
22	11
23	0
24	21
25	20
26	13
27	24
28	21
29	0
30	15
31	0
32	30
33	0
34	17
35	0
36	33
37	0
38	19
39	26
40	35
41	0
42	35
43	0
44	33
45	30
46	23
47	0
48	45
49	42
50	45
51	0
52	39
53	0
54	51
55	44
56	49
57	38
58	29
59	0
60	45
61	0
62	31
63	56
64	62
65	0
66	33
67	0
68	51
69	0
70	35
71	0
72	69
73	0
74	37
75	60
76	57
77	0
78	65
79	0
80	75
81	78
82	41
83	0
84	77
85	0
86	43
87	0
88	77
89	0
90	75