A081171 - cp's OEIS frontend

A081171 Triangle in which n-th row gives trajectory of n (including n itself) under the map x -> x/2 if x is even, x -> 3x-3 if x is odd, stopping when reaching one of 1, 3, 5, 15, 51.

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

[1, 0, 2, 1, 3, 0, 4, 2, 1, 5, 2, 1, 6, 3, 7, 4, 2, 1, 8, 4, 2, 1, 9, 6, 3, 10, 5, 11, 8, 4, 2, 1, 12, 6, 3, 13, 10, 5, 14, 7, 4, 2, 1, 15, 12, 6, 3, 16, 8, 4, 2, 1, 17, 14, 7, 4, 2, 1, 18, 9, 6, 3, 19, 16, 8, 4, 2, 1, 20, 10, 5, 21, 18, 9, 6, 3, 22, 11, 8, 4, 2, 1, 23, 20, 10, 5, 24, 12, 6, 3, 25, 22]

cp's OEIS Frontend

A081171 Triangle in which n-th row gives trajectory of n (including n itself) under the map x -> x/2 if x is even, x -> 3x-3 if x is odd, stopping when reaching one of 1, 3, 5, 15, 51.

Table of values

List of values

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

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

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