A116550 - cp's OEIS frontend

A116550 The bi-unitary analog of Euler's totient function of n.

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

[1, 1, 2, 3, 4, 3, 6, 7, 8, 6, 10, 8, 12, 9, 9, 15, 16, 12, 18, 14, 14, 15, 22, 17, 24, 18, 26, 21, 28, 15, 30, 31, 23, 24, 25, 29, 36, 27, 28, 31, 40, 21, 42, 35, 34, 33, 46, 36, 48, 36, 37, 42, 52, 39, 42, 46, 42, 42, 58, 34, 60, 45, 51, 63, 50, 35, 66, 56, 51, 38, 70, 62, 72, 54]

cp's OEIS Frontend

A116550 The bi-unitary analog of Euler's totient function of n.

Table of values

List of values

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

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

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