A378929 - cp's OEIS frontend

A378929 Number of steps it takes for the chain of f(n) = n * d(n) / gcd(n, d(n))^2 to reach a cycle from a starting number n.

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

[0, 1, 1, 3, 1, 0, 1, 2, 2, 0, 1, 2, 1, 0, 3, 4, 1, 2, 1, 4, 3, 0, 1, 2, 1, 0, 4, 4, 1, 3, 1, 6, 3, 0, 1, 4, 1, 0, 3, 2, 1, 3, 1, 4, 4, 0, 1, 5, 1, 0, 3, 4, 1, 4, 1, 2, 3, 0, 1, 2, 1, 0, 4, 8, 1, 3, 1, 4, 3, 0, 1, 1, 1, 0, 0, 4, 1, 3, 1, 3, 1, 0, 1, 2, 1, 0, 3, 2]

cp's OEIS Frontend

A378929 Number of steps it takes for the chain of f(n) = n * d(n) / gcd(n, d(n))^2 to reach a cycle from a starting number n.

Table of values

List of values

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

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

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