A286380 - cp's OEIS frontend

A286380 a(n) = the minimum number of iterations of the reduced Collatz function R required to yield 1. The function R (A139391) is defined as R(k) = (3k+1)/2^r, with r as large as possible.

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	3
7	5
8	1
9	6
10	2
11	4
12	3
13	2
14	6
15	5
16	1
17	3
18	7
19	6
20	2
21	1
22	5
23	4
24	3
25	7
26	3
27	41
28	6
29	5
30	6
31	39
32	1
33	8
34	4
35	3
36	7
37	6
38	7
39	11
40	2
41	40
42	2
43	9
44	5
45	4
46	5
47	38
48	3
49	7
50	8
51	7
52	3
53	2
54	42
55	41
56	6
57	10
58	6
59	10
60	6
61	5
62	40
63	39
64	1
65	8
66	9
67	8
68	4
69	3
70	4
71	37
72	7
73	42
74	7
75	3
76	7
77	6
78	12
79	11
80	2
81	6
82	41
83	40
84	2
85	1
86	10
87	9
88	5
89	9
90	5
91	33
92	5
93	4
94	39
95	38
96	3
97	43
98	8
99	7
100	8
101	7
102	8
103	31
104	3
105	12
106	3
107	36
108	42
109	41
110	42
111	24

[0, 1, 2, 1, 1, 3, 5, 1, 6, 2, 4, 3, 2, 6, 5, 1, 3, 7, 6, 2, 1, 5, 4, 3, 7, 3, 41, 6, 5, 6, 39, 1, 8, 4, 3, 7, 6, 7, 11, 2, 40, 2, 9, 5, 4, 5, 38, 3, 7, 8, 7, 3, 2, 42, 41, 6, 10, 6, 10, 6, 5, 40, 39, 1, 8, 9, 8, 4, 3, 4, 37, 7, 42, 7, 3, 7, 6, 12, 11, 2, 6, 41, 40, 2, 1, 10, 9, 5, 9, 5, 33, 5, 4, 39, 38, 3, 43, 8, 7, 8, 7, 8, 31, 3, 12, 3, 36, 42, 41, 42, 24]

cp's OEIS Frontend

A286380 a(n) = the minimum number of iterations of the reduced Collatz function R required to yield 1. The function R (A139391) is defined as R(k) = (3k+1)/2^r, with r as large as possible.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	3
7	5
8	1
9	6
10	2
11	4
12	3
13	2
14	6
15	5
16	1
17	3
18	7
19	6
20	2
21	1
22	5
23	4
24	3
25	7
26	3
27	41
28	6
29	5
30	6
31	39
32	1
33	8
34	4
35	3
36	7
37	6
38	7
39	11
40	2
41	40
42	2
43	9
44	5
45	4
46	5
47	38
48	3
49	7
50	8
51	7
52	3
53	2
54	42
55	41
56	6
57	10
58	6
59	10
60	6
61	5
62	40
63	39
64	1
65	8
66	9
67	8
68	4
69	3
70	4
71	37
72	7
73	42
74	7
75	3
76	7
77	6
78	12
79	11
80	2
81	6
82	41
83	40
84	2
85	1
86	10
87	9
88	5
89	9
90	5
91	33
92	5
93	4
94	39
95	38
96	3
97	43
98	8
99	7
100	8
101	7
102	8
103	31
104	3
105	12
106	3
107	36
108	42
109	41
110	42
111	24

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	3
7	5
8	1
9	6
10	2
11	4
12	3
13	2
14	6
15	5
16	1
17	3
18	7
19	6
20	2
21	1
22	5
23	4
24	3
25	7
26	3
27	41
28	6
29	5
30	6
31	39
32	1
33	8
34	4
35	3
36	7
37	6
38	7
39	11
40	2
41	40
42	2
43	9
44	5
45	4
46	5
47	38
48	3
49	7
50	8
51	7
52	3
53	2
54	42
55	41
56	6
57	10
58	6
59	10
60	6
61	5
62	40
63	39
64	1
65	8
66	9
67	8
68	4
69	3
70	4
71	37
72	7
73	42
74	7
75	3
76	7
77	6
78	12
79	11
80	2
81	6
82	41
83	40
84	2
85	1
86	10
87	9
88	5
89	9
90	5
91	33
92	5
93	4
94	39
95	38
96	3
97	43
98	8
99	7
100	8
101	7
102	8
103	31
104	3
105	12
106	3
107	36
108	42
109	41
110	42
111	24

n	a(n)
1	0
2	1
3	2
4	1
5	1
6	3
7	5
8	1
9	6
10	2
11	4
12	3
13	2
14	6
15	5
16	1
17	3
18	7
19	6
20	2
21	1
22	5
23	4
24	3
25	7
26	3
27	41
28	6
29	5
30	6
31	39
32	1
33	8
34	4
35	3
36	7
37	6
38	7
39	11
40	2
41	40
42	2
43	9
44	5
45	4
46	5
47	38
48	3
49	7
50	8
51	7
52	3
53	2
54	42
55	41
56	6
57	10
58	6
59	10
60	6
61	5
62	40
63	39
64	1
65	8
66	9
67	8
68	4
69	3
70	4
71	37
72	7
73	42
74	7
75	3
76	7
77	6
78	12
79	11
80	2
81	6
82	41
83	40
84	2
85	1
86	10
87	9
88	5
89	9
90	5
91	33
92	5
93	4
94	39
95	38
96	3
97	43
98	8
99	7
100	8
101	7
102	8
103	31
104	3
105	12
106	3
107	36
108	42
109	41
110	42
111	24