A377437 - cp's OEIS frontend

A377437 Number of multiplication steps for n to reach 1 when iterating 5x+1 removing factors 2 and 3, or -1 if it never reaches 1.

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

[0, 0, 0, 0, 4, 0, 1, 0, 0, 4, 2, 0, 3, 1, 4, 0, 2, 0, 1, 4, 1, 2, 6, 0, 2, 3, 0, 1, 5, 4, 4, 0, 2, 2, 3, 0, 5, 1, 3, 4, 3, 1, 1, 2, 4, 6, 7, 0, 4, 2, 2, 3, 7, 0, 7, 1, 1, 5, 6, 4, 3, 4, 1, 0, 4, 2, 2, 2, 6, 3, 7, 0, 4, 5, 2, 1, 5, 3, 3, 4, 0, 3, 4, 1, 8, 1, 5, 2, 6, 4, 2, 6, 4, 7, 16, 0, 1, 4, 2, 2, 5, 2, 2, 3]

cp's OEIS Frontend

A377437 Number of multiplication steps for n to reach 1 when iterating 5x+1 removing factors 2 and 3, or -1 if it never reaches 1.

Table of values

List of values

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

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

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