A365017 - cp's OEIS frontend

A365017 a(n) is the least nonnegative integer not already in the sequence whose binary expansion is not the concatenation of any two earlier terms.

n	a(n)
1	0
2	1
3	3
4	4
5	5
6	14
7	15
8	16
9	17
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	38
19	39
20	46
21	47
22	60
23	61
24	64
25	65
26	66
27	68
28	69
29	70
30	72
31	73
32	74
33	80
34	81
35	82
36	84
37	85
38	86
39	88
40	89
41	90
42	96
43	97
44	98
45	100
46	101
47	104
48	105
49	106
50	108
51	109
52	115
53	119
54	126
55	127
56	134
57	135
58	142
59	143
60	151
61	156
62	157
63	158
64	166
65	167
66	174

[0, 1, 3, 4, 5, 14, 15, 16, 17, 18, 20, 21, 22, 24, 25, 26, 27, 38, 39, 46, 47, 60, 61, 64, 65, 66, 68, 69, 70, 72, 73, 74, 80, 81, 82, 84, 85, 86, 88, 89, 90, 96, 97, 98, 100, 101, 104, 105, 106, 108, 109, 115, 119, 126, 127, 134, 135, 142, 143, 151, 156, 157, 158, 166, 167, 174]

cp's OEIS Frontend

A365017 a(n) is the least nonnegative integer not already in the sequence whose binary expansion is not the concatenation of any two earlier terms.

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	4
5	5
6	14
7	15
8	16
9	17
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	38
19	39
20	46
21	47
22	60
23	61
24	64
25	65
26	66
27	68
28	69
29	70
30	72
31	73
32	74
33	80
34	81
35	82
36	84
37	85
38	86
39	88
40	89
41	90
42	96
43	97
44	98
45	100
46	101
47	104
48	105
49	106
50	108
51	109
52	115
53	119
54	126
55	127
56	134
57	135
58	142
59	143
60	151
61	156
62	157
63	158
64	166
65	167
66	174

n	a(n)
1	0
2	1
3	3
4	4
5	5
6	14
7	15
8	16
9	17
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	38
19	39
20	46
21	47
22	60
23	61
24	64
25	65
26	66
27	68
28	69
29	70
30	72
31	73
32	74
33	80
34	81
35	82
36	84
37	85
38	86
39	88
40	89
41	90
42	96
43	97
44	98
45	100
46	101
47	104
48	105
49	106
50	108
51	109
52	115
53	119
54	126
55	127
56	134
57	135
58	142
59	143
60	151
61	156
62	157
63	158
64	166
65	167
66	174

n	a(n)
1	0
2	1
3	3
4	4
5	5
6	14
7	15
8	16
9	17
10	18
11	20
12	21
13	22
14	24
15	25
16	26
17	27
18	38
19	39
20	46
21	47
22	60
23	61
24	64
25	65
26	66
27	68
28	69
29	70
30	72
31	73
32	74
33	80
34	81
35	82
36	84
37	85
38	86
39	88
40	89
41	90
42	96
43	97
44	98
45	100
46	101
47	104
48	105
49	106
50	108
51	109
52	115
53	119
54	126
55	127
56	134
57	135
58	142
59	143
60	151
61	156
62	157
63	158
64	166
65	167
66	174