A214614 - cp's OEIS frontend

A214614 Irregular triangle read by rows: row n gives numbers <= n whose Collatz trajectory contains the trajectory of n.

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

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

cp's OEIS Frontend

A214614 Irregular triangle read by rows: row n gives numbers <= n whose Collatz trajectory contains the trajectory of n.

Table of values

List of values

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

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

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