A368136 - cp's OEIS frontend

A368136 Numbers k for which a generalized Collatz trajectory (x / k if k divides x, x + ceiling(x / k) otherwise) has non-elementary loops starting from a positive integer x_0 < k^2.

n	a(n)
1	3
2	4
3	6
4	9
5	10
6	15
7	16
8	17
9	20
10	23
11	24
12	27
13	29
14	31
15	48
16	54
17	57
18	78
19	85
20	94
21	111
22	118
23	123
24	127
25	129
26	134
27	136
28	171
29	172
30	225
31	368
32	419
33	540
34	547
35	706
36	744
37	1112
38	1148
39	1169
40	1229
41	1308
42	1403
43	1545
44	1782
45	1869
46	1926
47	1939

[3, 4, 6, 9, 10, 15, 16, 17, 20, 23, 24, 27, 29, 31, 48, 54, 57, 78, 85, 94, 111, 118, 123, 127, 129, 134, 136, 171, 172, 225, 368, 419, 540, 547, 706, 744, 1112, 1148, 1169, 1229, 1308, 1403, 1545, 1782, 1869, 1926, 1939]

cp's OEIS Frontend

A368136 Numbers k for which a generalized Collatz trajectory (x / k if k divides x, x + ceiling(x / k) otherwise) has non-elementary loops starting from a positive integer x_0 < k^2.

Table of values

List of values