A166245 - cp's OEIS frontend

A166245 Numbers n such that the Collatz trajectory of n (iterate T(k)=k/2 if k is even, (3k+1)/2 if k is odd, A014682, starting at n and stopping if you reach 1) never exceeds n.

n	a(n)
1	1
2	2
3	4
4	8
5	10
6	12
7	16
8	20
9	24
10	26
11	28
12	32
13	34
14	36
15	40
16	42
17	44
18	48
19	50
20	52
21	56
22	58
23	64
24	66
25	68
26	72
27	74
28	76
29	80
30	84
31	88
32	90
33	92
34	96
35	98
36	100
37	104
38	106
39	112
40	114
41	116
42	120
43	122
44	128
45	130
46	132
47	136
48	138
49	140
50	144
51	148
52	152
53	154
54	156
55	160
56	162
57	168
58	170
59	172
60	176
61	178
62	180

[1, 2, 4, 8, 10, 12, 16, 20, 24, 26, 28, 32, 34, 36, 40, 42, 44, 48, 50, 52, 56, 58, 64, 66, 68, 72, 74, 76, 80, 84, 88, 90, 92, 96, 98, 100, 104, 106, 112, 114, 116, 120, 122, 128, 130, 132, 136, 138, 140, 144, 148, 152, 154, 156, 160, 162, 168, 170, 172, 176, 178, 180]

cp's OEIS Frontend

A166245 Numbers n such that the Collatz trajectory of n (iterate T(k)=k/2 if k is even, (3k+1)/2 if k is odd, A014682, starting at n and stopping if you reach 1) never exceeds n.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	8
5	10
6	12
7	16
8	20
9	24
10	26
11	28
12	32
13	34
14	36
15	40
16	42
17	44
18	48
19	50
20	52
21	56
22	58
23	64
24	66
25	68
26	72
27	74
28	76
29	80
30	84
31	88
32	90
33	92
34	96
35	98
36	100
37	104
38	106
39	112
40	114
41	116
42	120
43	122
44	128
45	130
46	132
47	136
48	138
49	140
50	144
51	148
52	152
53	154
54	156
55	160
56	162
57	168
58	170
59	172
60	176
61	178
62	180

n	a(n)
1	1
2	2
3	4
4	8
5	10
6	12
7	16
8	20
9	24
10	26
11	28
12	32
13	34
14	36
15	40
16	42
17	44
18	48
19	50
20	52
21	56
22	58
23	64
24	66
25	68
26	72
27	74
28	76
29	80
30	84
31	88
32	90
33	92
34	96
35	98
36	100
37	104
38	106
39	112
40	114
41	116
42	120
43	122
44	128
45	130
46	132
47	136
48	138
49	140
50	144
51	148
52	152
53	154
54	156
55	160
56	162
57	168
58	170
59	172
60	176
61	178
62	180

n	a(n)
1	1
2	2
3	4
4	8
5	10
6	12
7	16
8	20
9	24
10	26
11	28
12	32
13	34
14	36
15	40
16	42
17	44
18	48
19	50
20	52
21	56
22	58
23	64
24	66
25	68
26	72
27	74
28	76
29	80
30	84
31	88
32	90
33	92
34	96
35	98
36	100
37	104
38	106
39	112
40	114
41	116
42	120
43	122
44	128
45	130
46	132
47	136
48	138
49	140
50	144
51	148
52	152
53	154
54	156
55	160
56	162
57	168
58	170
59	172
60	176
61	178
62	180