A072106 - cp's OEIS frontend

A072106 The number of nontotients (even and odd) in the reduced residue system of n.

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

[0, 0, 0, 1, 1, 1, 2, 3, 2, 3, 4, 3, 5, 5, 4, 7, 8, 5, 9, 7, 5, 9, 11, 7, 10, 11, 10, 11, 15, 7, 16, 15, 11, 15, 13, 11, 20, 17, 14, 15, 23, 11, 24, 19, 15, 21, 26, 15, 23, 19, 19, 23, 30, 17, 23, 23, 21, 27, 33, 15, 34, 29, 22, 31, 27, 19, 38, 31, 28, 23, 41, 23, 42, 35, 26, 35, 37]

cp's OEIS Frontend

A072106 The number of nontotients (even and odd) in the reduced residue system of n.

Table of values

List of values

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

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

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