A177729 - cp's OEIS frontend

A177729 Positive integers which do not appear in a Collatz sequence starting from a smaller positive integer.

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	9
7	12
8	15
9	18
10	19
11	21
12	24
13	25
14	27
15	30
16	33
17	36
18	37
19	39
20	42
21	43
22	45
23	48
24	51
25	54
26	55
27	57
28	60
29	63
30	66
31	69
32	72
33	73
34	75
35	78
36	79
37	81
38	84
39	87
40	90
41	93
42	96
43	97
44	99
45	102
46	105
47	108
48	109
49	111
50	114
51	115
52	117
53	120
54	123
55	126
56	127
57	129
58	132
59	133
60	135
61	138
62	141

[1, 2, 3, 6, 7, 9, 12, 15, 18, 19, 21, 24, 25, 27, 30, 33, 36, 37, 39, 42, 43, 45, 48, 51, 54, 55, 57, 60, 63, 66, 69, 72, 73, 75, 78, 79, 81, 84, 87, 90, 93, 96, 97, 99, 102, 105, 108, 109, 111, 114, 115, 117, 120, 123, 126, 127, 129, 132, 133, 135, 138, 141]

cp's OEIS Frontend

A177729 Positive integers which do not appear in a Collatz sequence starting from a smaller positive integer.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	9
7	12
8	15
9	18
10	19
11	21
12	24
13	25
14	27
15	30
16	33
17	36
18	37
19	39
20	42
21	43
22	45
23	48
24	51
25	54
26	55
27	57
28	60
29	63
30	66
31	69
32	72
33	73
34	75
35	78
36	79
37	81
38	84
39	87
40	90
41	93
42	96
43	97
44	99
45	102
46	105
47	108
48	109
49	111
50	114
51	115
52	117
53	120
54	123
55	126
56	127
57	129
58	132
59	133
60	135
61	138
62	141

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	9
7	12
8	15
9	18
10	19
11	21
12	24
13	25
14	27
15	30
16	33
17	36
18	37
19	39
20	42
21	43
22	45
23	48
24	51
25	54
26	55
27	57
28	60
29	63
30	66
31	69
32	72
33	73
34	75
35	78
36	79
37	81
38	84
39	87
40	90
41	93
42	96
43	97
44	99
45	102
46	105
47	108
48	109
49	111
50	114
51	115
52	117
53	120
54	123
55	126
56	127
57	129
58	132
59	133
60	135
61	138
62	141

n	a(n)
1	1
2	2
3	3
4	6
5	7
6	9
7	12
8	15
9	18
10	19
11	21
12	24
13	25
14	27
15	30
16	33
17	36
18	37
19	39
20	42
21	43
22	45
23	48
24	51
25	54
26	55
27	57
28	60
29	63
30	66
31	69
32	72
33	73
34	75
35	78
36	79
37	81
38	84
39	87
40	90
41	93
42	96
43	97
44	99
45	102
46	105
47	108
48	109
49	111
50	114
51	115
52	117
53	120
54	123
55	126
56	127
57	129
58	132
59	133
60	135
61	138
62	141