A336527 - cp's OEIS frontend

A336527 a(1) = 1; a(2) = 2; for n > 2, a(n) is the least number > a(n-1) whose binary representation is uniquely the concatenation of the binary representations of two distinct earlier terms.

n	a(n)
1	1
2	2
3	5
4	6
5	11
6	14
7	21
8	23
9	26
10	27
11	29
12	30
13	47
14	62
15	85
16	86
17	87
18	90
19	95
20	106
21	107
22	111
23	117
24	122
25	125
26	126
27	171
28	174
29	183
30	186
31	187
32	191
33	219
34	234
35	237
36	238
37	239
38	246
39	251
40	254
41	341
42	347
43	349
44	351
45	363
46	383
47	426
48	431
49	442
50	447
51	470
52	471
53	474
54	479
55	491
56	495
57	501

[1, 2, 5, 6, 11, 14, 21, 23, 26, 27, 29, 30, 47, 62, 85, 86, 87, 90, 95, 106, 107, 111, 117, 122, 125, 126, 171, 174, 183, 186, 187, 191, 219, 234, 237, 238, 239, 246, 251, 254, 341, 347, 349, 351, 363, 383, 426, 431, 442, 447, 470, 471, 474, 479, 491, 495, 501]

cp's OEIS Frontend

A336527 a(1) = 1; a(2) = 2; for n > 2, a(n) is the least number > a(n-1) whose binary representation is uniquely the concatenation of the binary representations of two distinct earlier terms.

Table of values

List of values

n	a(n)
1	1
2	2
3	5
4	6
5	11
6	14
7	21
8	23
9	26
10	27
11	29
12	30
13	47
14	62
15	85
16	86
17	87
18	90
19	95
20	106
21	107
22	111
23	117
24	122
25	125
26	126
27	171
28	174
29	183
30	186
31	187
32	191
33	219
34	234
35	237
36	238
37	239
38	246
39	251
40	254
41	341
42	347
43	349
44	351
45	363
46	383
47	426
48	431
49	442
50	447
51	470
52	471
53	474
54	479
55	491
56	495
57	501

n	a(n)
1	1
2	2
3	5
4	6
5	11
6	14
7	21
8	23
9	26
10	27
11	29
12	30
13	47
14	62
15	85
16	86
17	87
18	90
19	95
20	106
21	107
22	111
23	117
24	122
25	125
26	126
27	171
28	174
29	183
30	186
31	187
32	191
33	219
34	234
35	237
36	238
37	239
38	246
39	251
40	254
41	341
42	347
43	349
44	351
45	363
46	383
47	426
48	431
49	442
50	447
51	470
52	471
53	474
54	479
55	491
56	495
57	501

n	a(n)
1	1
2	2
3	5
4	6
5	11
6	14
7	21
8	23
9	26
10	27
11	29
12	30
13	47
14	62
15	85
16	86
17	87
18	90
19	95
20	106
21	107
22	111
23	117
24	122
25	125
26	126
27	171
28	174
29	183
30	186
31	187
32	191
33	219
34	234
35	237
36	238
37	239
38	246
39	251
40	254
41	341
42	347
43	349
44	351
45	363
46	383
47	426
48	431
49	442
50	447
51	470
52	471
53	474
54	479
55	491
56	495
57	501