A180076 - cp's OEIS frontend

A180076 a(n+1) = if it exists, smallest number not occurring earlier that is contained in binary representation of a(n), otherwise: a(n+1) = 3*a(n)+1; a(0) = 0.

n	a(n)
0	0
1	1
2	4
3	2
4	7
5	3
6	10
7	5
8	16
9	8
10	25
11	6
12	19
13	9
14	28
15	12
16	37
17	18
18	55
19	11
20	34
21	17
22	52
23	13
24	40
25	20
26	61
27	14
28	43
29	21
30	64
31	32
32	97
33	24
34	73
35	36
36	109
37	22
38	67
39	33
40	100
41	50
42	151
43	23
44	70
45	35
46	106
47	26
48	79
49	15
50	46
51	139
52	69
53	208
54	80
55	241
56	30
57	91
58	27
59	82
60	41
61	124
62	31
63	94
64	47
65	142
66	71
67	214
68	53
69	160

[0, 1, 4, 2, 7, 3, 10, 5, 16, 8, 25, 6, 19, 9, 28, 12, 37, 18, 55, 11, 34, 17, 52, 13, 40, 20, 61, 14, 43, 21, 64, 32, 97, 24, 73, 36, 109, 22, 67, 33, 100, 50, 151, 23, 70, 35, 106, 26, 79, 15, 46, 139, 69, 208, 80, 241, 30, 91, 27, 82, 41, 124, 31, 94, 47, 142, 71, 214, 53, 160]

cp's OEIS Frontend

A180076 a(n+1) = if it exists, smallest number not occurring earlier that is contained in binary representation of a(n), otherwise: a(n+1) = 3*a(n)+1; a(0) = 0.

Table of values

List of values

n	a(n)
0	0
1	1
2	4
3	2
4	7
5	3
6	10
7	5
8	16
9	8
10	25
11	6
12	19
13	9
14	28
15	12
16	37
17	18
18	55
19	11
20	34
21	17
22	52
23	13
24	40
25	20
26	61
27	14
28	43
29	21
30	64
31	32
32	97
33	24
34	73
35	36
36	109
37	22
38	67
39	33
40	100
41	50
42	151
43	23
44	70
45	35
46	106
47	26
48	79
49	15
50	46
51	139
52	69
53	208
54	80
55	241
56	30
57	91
58	27
59	82
60	41
61	124
62	31
63	94
64	47
65	142
66	71
67	214
68	53
69	160

n	a(n)
0	0
1	1
2	4
3	2
4	7
5	3
6	10
7	5
8	16
9	8
10	25
11	6
12	19
13	9
14	28
15	12
16	37
17	18
18	55
19	11
20	34
21	17
22	52
23	13
24	40
25	20
26	61
27	14
28	43
29	21
30	64
31	32
32	97
33	24
34	73
35	36
36	109
37	22
38	67
39	33
40	100
41	50
42	151
43	23
44	70
45	35
46	106
47	26
48	79
49	15
50	46
51	139
52	69
53	208
54	80
55	241
56	30
57	91
58	27
59	82
60	41
61	124
62	31
63	94
64	47
65	142
66	71
67	214
68	53
69	160

n	a(n)
0	0
1	1
2	4
3	2
4	7
5	3
6	10
7	5
8	16
9	8
10	25
11	6
12	19
13	9
14	28
15	12
16	37
17	18
18	55
19	11
20	34
21	17
22	52
23	13
24	40
25	20
26	61
27	14
28	43
29	21
30	64
31	32
32	97
33	24
34	73
35	36
36	109
37	22
38	67
39	33
40	100
41	50
42	151
43	23
44	70
45	35
46	106
47	26
48	79
49	15
50	46
51	139
52	69
53	208
54	80
55	241
56	30
57	91
58	27
59	82
60	41
61	124
62	31
63	94
64	47
65	142
66	71
67	214
68	53
69	160