A323135 - cp's OEIS frontend

A323135 a(n) is the least number of iterations that n requires to reach a power of a prime under the map x -> A070229(x), or -1 if we never reach a power of a prime.

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

[0, 0, 0, 0, 0, 1, 0, 0, 0, 3, 0, 3, 0, 5, 2, 0, 0, 5, 0, 1, 4, 9, 0, 1, 0, 11, 0, 3, 0, 3, 0, 0, 8, 15, 2, 11, 0, 17, 10, 9, 0, 1, 0, 7, 8, 21, 0, 15, 0, 7, 14, 9, 0, 17, 6, 7, 16, 27, 0, 9, 0, 29, 6, 0, 8, 5, 0, 13, 20, 5, 0, 15, 0, 35, 14, 15, 4, 7, 0, 13, 0]

cp's OEIS Frontend

A323135 a(n) is the least number of iterations that n requires to reach a power of a prime under the map x -> A070229(x), or -1 if we never reach a power of a prime.

Table of values

List of values

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

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

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