A366927 - cp's OEIS frontend

A366927 Number of distinct primes p used in the mapping of k = k - k/p terminating at 1, where p is any of the prime factors of k.

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	3
14	3
15	3
16	1
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	4
30	3
31	4
32	1
33	4
34	2
35	4
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	4
44	3
45	3
46	4
47	5
48	2
49	3
50	2
51	3
52	3
53	4
54	2
55	3
56	3
57	3
58	4
59	5
60	3
61	4
62	4
63	3
64	1
65	4
66	4
67	5
68	2
69	5
70	4
71	5
72	2
73	3
74	3
75	3
76	3
77	5
78	3
79	4
80	2
81	2
82	3
83	4
84	3
85	3
86	4
87	4
88	3
89	4
90	3
91	4
92	4
93	4
94	5
95	4
96	2
97	3
98	3
99	4
100	2
101	3
102	3
103	4
104	3
105	4

[0, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 3, 1, 2, 2, 3, 2, 3, 3, 4, 2, 2, 3, 2, 3, 4, 3, 4, 1, 4, 2, 4, 2, 3, 3, 3, 2, 3, 3, 4, 3, 3, 4, 5, 2, 3, 2, 3, 3, 4, 2, 3, 3, 3, 4, 5, 3, 4, 4, 3, 1, 4, 4, 5, 2, 5, 4, 5, 2, 3, 3, 3, 3, 5, 3, 4, 2, 2, 3, 4, 3, 3, 4, 4, 3, 4, 3, 4, 4, 4, 5, 4, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4]

cp's OEIS Frontend

A366927 Number of distinct primes p used in the mapping of k = k - k/p terminating at 1, where p is any of the prime factors of k.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	3
14	3
15	3
16	1
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	4
30	3
31	4
32	1
33	4
34	2
35	4
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	4
44	3
45	3
46	4
47	5
48	2
49	3
50	2
51	3
52	3
53	4
54	2
55	3
56	3
57	3
58	4
59	5
60	3
61	4
62	4
63	3
64	1
65	4
66	4
67	5
68	2
69	5
70	4
71	5
72	2
73	3
74	3
75	3
76	3
77	5
78	3
79	4
80	2
81	2
82	3
83	4
84	3
85	3
86	4
87	4
88	3
89	4
90	3
91	4
92	4
93	4
94	5
95	4
96	2
97	3
98	3
99	4
100	2
101	3
102	3
103	4
104	3
105	4

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	3
14	3
15	3
16	1
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	4
30	3
31	4
32	1
33	4
34	2
35	4
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	4
44	3
45	3
46	4
47	5
48	2
49	3
50	2
51	3
52	3
53	4
54	2
55	3
56	3
57	3
58	4
59	5
60	3
61	4
62	4
63	3
64	1
65	4
66	4
67	5
68	2
69	5
70	4
71	5
72	2
73	3
74	3
75	3
76	3
77	5
78	3
79	4
80	2
81	2
82	3
83	4
84	3
85	3
86	4
87	4
88	3
89	4
90	3
91	4
92	4
93	4
94	5
95	4
96	2
97	3
98	3
99	4
100	2
101	3
102	3
103	4
104	3
105	4

n	a(n)
1	0
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	3
14	3
15	3
16	1
17	2
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	4
30	3
31	4
32	1
33	4
34	2
35	4
36	2
37	3
38	3
39	3
40	2
41	3
42	3
43	4
44	3
45	3
46	4
47	5
48	2
49	3
50	2
51	3
52	3
53	4
54	2
55	3
56	3
57	3
58	4
59	5
60	3
61	4
62	4
63	3
64	1
65	4
66	4
67	5
68	2
69	5
70	4
71	5
72	2
73	3
74	3
75	3
76	3
77	5
78	3
79	4
80	2
81	2
82	3
83	4
84	3
85	3
86	4
87	4
88	3
89	4
90	3
91	4
92	4
93	4
94	5
95	4
96	2
97	3
98	3
99	4
100	2
101	3
102	3
103	4
104	3
105	4