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A178415 Array T(n,k) of odd Collatz preimages read by antidiagonals.

Table of values

n a(n)
1 1
2 3
3 5
4 9
5 13
6 21
7 7
8 37
9 53
10 85
11 17
12 29
13 149
14 213
15 341
16 11
17 69
18 117
19 597
20 853
21 1365
22 25
23 45
24 277
25 469
26 2389
27 3413
28 5461
29 15
30 101
31 181
32 1109
33 1877
34 9557
35 13653
36 21845
37 33
38 61
39 405
40 725
41 4437
42 7509
43 38229
44 54613
45 87381
46 19
47 133
48 245
49 1621
50 2901
51 17749
52 30037

List of values

[1, 3, 5, 9, 13, 21, 7, 37, 53, 85, 17, 29, 149, 213, 341, 11, 69, 117, 597, 853, 1365, 25, 45, 277, 469, 2389, 3413, 5461, 15, 101, 181, 1109, 1877, 9557, 13653, 21845, 33, 61, 405, 725, 4437, 7509, 38229, 54613, 87381, 19, 133, 245, 1621, 2901, 17749, 30037]