A362681 - cp's OEIS frontend

A362681 The number of steps, starting from n, to reach x<=2 in an iteration x <- 2x - {sum of proper factors of 2x}.

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

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

cp's OEIS Frontend

A362681 The number of steps, starting from n, to reach x<=2 in an iteration x <- 2x - {sum of proper factors of 2x}.

Table of values

List of values

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

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

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