A379259 - cp's OEIS frontend

A379259 a(n) is the number of iterations that n requires to reach a 3-smooth number under the map x -> phi(x).

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

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

cp's OEIS Frontend

A379259 a(n) is the number of iterations that n requires to reach a 3-smooth number under the map x -> phi(x).

Table of values

List of values

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

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

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