A125754 - cp's OEIS frontend

A125754 Numbers n whose reverse binary representation has the following property: let a 0 mean "halving" and a 1 mean "k -> 3k+1". The number describes an operation k -> f_n(k). If the equation f_n(k) = k has an integer solution, n is a term in the sequence.

n	a(n)
1	2
2	4
3	10
4	17
5	18
6	20
7	24
8	36
9	42
10	140
11	145
12	170
13	200
14	292
15	561
16	594
17	660
18	682
19	792
20	1059
21	1136
22	1553
23	1800
24	2340
25	2730
26	4150
27	4274
28	4297
29	4308
30	4389
31	4433
32	4490
33	4634
34	4696
35	4705
36	4741
37	4804
38	4876
39	5133
40	5164
41	5218
42	5254
43	5400
44	5409
45	5668

[2, 4, 10, 17, 18, 20, 24, 36, 42, 140, 145, 170, 200, 292, 561, 594, 660, 682, 792, 1059, 1136, 1553, 1800, 2340, 2730, 4150, 4274, 4297, 4308, 4389, 4433, 4490, 4634, 4696, 4705, 4741, 4804, 4876, 5133, 5164, 5218, 5254, 5400, 5409, 5668]

cp's OEIS Frontend

A125754 Numbers n whose reverse binary representation has the following property: let a 0 mean "halving" and a 1 mean "k -> 3k+1". The number describes an operation k -> f_n(k). If the equation f_n(k) = k has an integer solution, n is a term in the sequence.

Table of values

List of values