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A213672 Final term in Collatz trajectory of n that did not appear in previous trajectories.

Table of values

n a(n)
1 1
2 2
3 4
4 0
5 0
6 6
7 20
8 0
9 14
10 0
11 0
12 12
13 0
14 0
15 80
16 0
17 0
18 18
19 44
20 0
21 32
22 0
23 0
24 24
25 38
26 0
27 92
28 0
29 0
30 30
31 0
32 0
33 50
34 0
35 0
36 36
37 56
38 0
39 152
40 0
41 0
42 42
43 74
44 0
45 68
46 0
47 0
48 48
49 0
50 0
51 116
52 0
53 0
54 54
55 188
56 0
57 86
58 0
59 0
60 60
61 0
62 0
63 728
64 0
65 0
66 66
67 0
68 0
69 104
70 0
71 0
72 72
73 110
74 0
75 128
76 0

List of values

[1, 2, 4, 0, 0, 6, 20, 0, 14, 0, 0, 12, 0, 0, 80, 0, 0, 18, 44, 0, 32, 0, 0, 24, 38, 0, 92, 0, 0, 30, 0, 0, 50, 0, 0, 36, 56, 0, 152, 0, 0, 42, 74, 0, 68, 0, 0, 48, 0, 0, 116, 0, 0, 54, 188, 0, 86, 0, 0, 60, 0, 0, 728, 0, 0, 66, 0, 0, 104, 0, 0, 72, 110, 0, 128, 0]

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