A375494 - cp's OEIS frontend

A375494 a(n) = minimum number of operations chosen from f(x) = 3x+1 and g(x) = floor(x/2) needed to reach n when starting from 1.

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

[1, 0, 2, 4, 1, 6, 3, 3, 8, 5, 5, 5, 10, 2, 7, 7, 7, 7, 12, 4, 4, 9, 4, 9, 9, 9, 9, 14, 6, 6, 6, 6, 11, 6, 6, 11, 11, 11, 11, 11, 3, 16, 8, 8, 8, 8, 8, 8, 13, 8, 8, 8, 8, 13, 13, 13, 13, 13, 5, 13, 5, 5, 18, 10, 10, 10, 10, 5, 10, 10, 10, 10, 15, 10, 10, 10, 10, 10, 10, 10]

cp's OEIS Frontend

A375494 a(n) = minimum number of operations chosen from f(x) = 3x+1 and g(x) = floor(x/2) needed to reach n when starting from 1.

Table of values

List of values

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

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

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