A171870 - cp's OEIS frontend

A171870 For odd numbers x, a(x) is the number of complex numbers z in the zx + 1 problem giving the same number of iterations as the 3x + 1 problem requires to reach 1.

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

[0, 1, 0, 4, 5, 3, 1, 4, 2, 5, 0, 3, 6, 40, 4, 38, 7, 2, 5, 10, 39, 8, 3, 37, 6, 6, 1, 40, 9, 9, 4, 38, 7, 7, 2, 36, 41, 2, 5, 10, 5, 39, 0, 8, 8, 32, 3, 37, 42, 6, 6, 30, 11, 35, 40, 23, 1, 9, 4, 9, 33, 14, 38, 14, 43, 7, 7, 12, 31, 12, 2, 36, 41, 41, 5, 2, 10, 29, 10, 17, 34, 5, 39, 22, 15, 44, 8]

cp's OEIS Frontend

A171870 For odd numbers x, a(x) is the number of complex numbers z in the zx + 1 problem giving the same number of iterations as the 3x + 1 problem requires to reach 1.

Table of values

List of values

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

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

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