A348136 - cp's OEIS frontend

A348136 Irregular triangle read by rows T(n,k) in which row n lists the first digit of every term of the trajectory of n in Collatz problem including the trajectory [1, 4, 2, 1] for n = 1.

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

[1, 4, 2, 1, 2, 1, 3, 1, 5, 1, 8, 4, 2, 1, 4, 2, 1, 5, 1, 8, 4, 2, 1, 6, 3, 1, 5, 1, 8, 4, 2, 1, 7, 2, 1, 3, 1, 5, 2, 1, 4, 2, 1, 5, 1, 8, 4, 2, 1, 8, 4, 2, 1, 9, 2, 1, 7, 2, 1, 3, 1, 5, 2, 1, 4, 2, 1, 5, 1, 8, 4, 2, 1, 1, 5, 1, 8, 4, 2, 1, 1, 3, 1, 5, 2, 1, 4, 2, 1, 5, 1, 8, 4, 2, 1, 1, 6, 3, 1, 5, 1, 8, 4, 2, 1]

cp's OEIS Frontend

A348136 Irregular triangle read by rows T(n,k) in which row n lists the first digit of every term of the trajectory of n in Collatz problem including the trajectory [1, 4, 2, 1] for n = 1.

Table of values

List of values

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

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

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