A125756 - cp's OEIS frontend

A125756 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 a positive integer solution, n is a term in the sequence.

n	a(n)
1	4
2	36
3	140
4	145
5	200
6	292
7	1059
8	1136
9	1553
10	1800
11	2340
12	4150
13	4274
14	4297
15	4308
16	4389
17	4433
18	4490
19	4634
20	4696
21	4705
22	4741
23	4804
24	4876
25	5133
26	5164
27	5218
28	5254
29	5400
30	5409
31	5668
32	5712
33	5761
34	6244
35	6290
36	6312
37	6448
38	6466
39	6662
40	6800
41	6976

[4, 36, 140, 145, 200, 292, 1059, 1136, 1553, 1800, 2340, 4150, 4274, 4297, 4308, 4389, 4433, 4490, 4634, 4696, 4705, 4741, 4804, 4876, 5133, 5164, 5218, 5254, 5400, 5409, 5668, 5712, 5761, 6244, 6290, 6312, 6448, 6466, 6662, 6800, 6976]

cp's OEIS Frontend

A125756 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 a positive integer solution, n is a term in the sequence.

Table of values

List of values