A349128 - cp's OEIS frontend

A349128 a(n) = phi(A064989(n)), where A064989 is multiplicative with a(2^e) = 1 and a(p^e) = prevprime(p)^e for odd primes p, and phi is Euler totient function.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	4
8	1
9	2
10	2
11	6
12	1
13	10
14	4
15	2
16	1
17	12
18	2
19	16
20	2
21	4
22	6
23	18
24	1
25	6
26	10
27	4
28	4
29	22
30	2
31	28
32	1
33	6
34	12
35	8
36	2
37	30
38	16
39	10
40	2
41	36
42	4
43	40
44	6
45	4
46	18
47	42
48	1
49	20
50	6
51	12
52	10
53	46
54	4
55	12
56	4
57	16
58	22
59	52
60	2
61	58
62	28
63	8
64	1
65	20
66	6
67	60
68	12
69	18
70	8
71	66
72	2
73	70
74	30
75	6
76	16
77	24
78	10
79	72
80	2
81	8
82	36
83	78
84	4
85	24
86	40
87	22
88	6
89	82
90	4
91	40

[1, 1, 1, 1, 2, 1, 4, 1, 2, 2, 6, 1, 10, 4, 2, 1, 12, 2, 16, 2, 4, 6, 18, 1, 6, 10, 4, 4, 22, 2, 28, 1, 6, 12, 8, 2, 30, 16, 10, 2, 36, 4, 40, 6, 4, 18, 42, 1, 20, 6, 12, 10, 46, 4, 12, 4, 16, 22, 52, 2, 58, 28, 8, 1, 20, 6, 60, 12, 18, 8, 66, 2, 70, 30, 6, 16, 24, 10, 72, 2, 8, 36, 78, 4, 24, 40, 22, 6, 82, 4, 40]

cp's OEIS Frontend

A349128 a(n) = phi(A064989(n)), where A064989 is multiplicative with a(2^e) = 1 and a(p^e) = prevprime(p)^e for odd primes p, and phi is Euler totient function.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	4
8	1
9	2
10	2
11	6
12	1
13	10
14	4
15	2
16	1
17	12
18	2
19	16
20	2
21	4
22	6
23	18
24	1
25	6
26	10
27	4
28	4
29	22
30	2
31	28
32	1
33	6
34	12
35	8
36	2
37	30
38	16
39	10
40	2
41	36
42	4
43	40
44	6
45	4
46	18
47	42
48	1
49	20
50	6
51	12
52	10
53	46
54	4
55	12
56	4
57	16
58	22
59	52
60	2
61	58
62	28
63	8
64	1
65	20
66	6
67	60
68	12
69	18
70	8
71	66
72	2
73	70
74	30
75	6
76	16
77	24
78	10
79	72
80	2
81	8
82	36
83	78
84	4
85	24
86	40
87	22
88	6
89	82
90	4
91	40

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	4
8	1
9	2
10	2
11	6
12	1
13	10
14	4
15	2
16	1
17	12
18	2
19	16
20	2
21	4
22	6
23	18
24	1
25	6
26	10
27	4
28	4
29	22
30	2
31	28
32	1
33	6
34	12
35	8
36	2
37	30
38	16
39	10
40	2
41	36
42	4
43	40
44	6
45	4
46	18
47	42
48	1
49	20
50	6
51	12
52	10
53	46
54	4
55	12
56	4
57	16
58	22
59	52
60	2
61	58
62	28
63	8
64	1
65	20
66	6
67	60
68	12
69	18
70	8
71	66
72	2
73	70
74	30
75	6
76	16
77	24
78	10
79	72
80	2
81	8
82	36
83	78
84	4
85	24
86	40
87	22
88	6
89	82
90	4
91	40

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	4
8	1
9	2
10	2
11	6
12	1
13	10
14	4
15	2
16	1
17	12
18	2
19	16
20	2
21	4
22	6
23	18
24	1
25	6
26	10
27	4
28	4
29	22
30	2
31	28
32	1
33	6
34	12
35	8
36	2
37	30
38	16
39	10
40	2
41	36
42	4
43	40
44	6
45	4
46	18
47	42
48	1
49	20
50	6
51	12
52	10
53	46
54	4
55	12
56	4
57	16
58	22
59	52
60	2
61	58
62	28
63	8
64	1
65	20
66	6
67	60
68	12
69	18
70	8
71	66
72	2
73	70
74	30
75	6
76	16
77	24
78	10
79	72
80	2
81	8
82	36
83	78
84	4
85	24
86	40
87	22
88	6
89	82
90	4
91	40