A078719 - cp's OEIS frontend

A078719 Number of odd terms among n, f(n), f(f(n)), ...., 1 for the Collatz function (that is, until reaching "1" for the first time), or -1 if 1 is never reached.

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

[1, 1, 3, 1, 2, 3, 6, 1, 7, 2, 5, 3, 3, 6, 6, 1, 4, 7, 7, 2, 2, 5, 5, 3, 8, 3, 42, 6, 6, 6, 40, 1, 9, 4, 4, 7, 7, 7, 12, 2, 41, 2, 10, 5, 5, 5, 39, 3, 8, 8, 8, 3, 3, 42, 42, 6, 11, 6, 11, 6, 6, 40, 40, 1, 9, 9, 9, 4, 4, 4, 38, 7, 43, 7, 4, 7, 7, 12, 12, 2, 7, 41, 41, 2, 2, 10, 10, 5, 10, 5, 34, 5, 5, 39]

cp's OEIS Frontend

A078719 Number of odd terms among n, f(n), f(f(n)), ...., 1 for the Collatz function (that is, until reaching "1" for the first time), or -1 if 1 is never reached.

Table of values

List of values

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

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

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