A043883 - cp's OEIS frontend

A043883 Numbers k such that 1 and 2 occur juxtaposed in the base-4 representation of k but not of k+1.

n	a(n)
1	6
2	9
3	22
4	27
5	39
6	41
7	54
8	57
9	70
10	73
11	86
12	91
13	111
14	118
15	121
16	134
17	137
18	159
19	167
20	169
21	182
22	185
23	198
24	201
25	214
26	219
27	231
28	233
29	246
30	249
31	262
32	265
33	278
34	283
35	295
36	297
37	310
38	313
39	326
40	329
41	342
42	347
43	367
44	374
45	377
46	447
47	454
48	457
49	470

[6, 9, 22, 27, 39, 41, 54, 57, 70, 73, 86, 91, 111, 118, 121, 134, 137, 159, 167, 169, 182, 185, 198, 201, 214, 219, 231, 233, 246, 249, 262, 265, 278, 283, 295, 297, 310, 313, 326, 329, 342, 347, 367, 374, 377, 447, 454, 457, 470]

cp's OEIS Frontend

A043883 Numbers k such that 1 and 2 occur juxtaposed in the base-4 representation of k but not of k+1.

Table of values

List of values

n	a(n)
1	6
2	9
3	22
4	27
5	39
6	41
7	54
8	57
9	70
10	73
11	86
12	91
13	111
14	118
15	121
16	134
17	137
18	159
19	167
20	169
21	182
22	185
23	198
24	201
25	214
26	219
27	231
28	233
29	246
30	249
31	262
32	265
33	278
34	283
35	295
36	297
37	310
38	313
39	326
40	329
41	342
42	347
43	367
44	374
45	377
46	447
47	454
48	457
49	470

n	a(n)
1	6
2	9
3	22
4	27
5	39
6	41
7	54
8	57
9	70
10	73
11	86
12	91
13	111
14	118
15	121
16	134
17	137
18	159
19	167
20	169
21	182
22	185
23	198
24	201
25	214
26	219
27	231
28	233
29	246
30	249
31	262
32	265
33	278
34	283
35	295
36	297
37	310
38	313
39	326
40	329
41	342
42	347
43	367
44	374
45	377
46	447
47	454
48	457
49	470

n	a(n)
1	6
2	9
3	22
4	27
5	39
6	41
7	54
8	57
9	70
10	73
11	86
12	91
13	111
14	118
15	121
16	134
17	137
18	159
19	167
20	169
21	182
22	185
23	198
24	201
25	214
26	219
27	231
28	233
29	246
30	249
31	262
32	265
33	278
34	283
35	295
36	297
37	310
38	313
39	326
40	329
41	342
42	347
43	367
44	374
45	377
46	447
47	454
48	457
49	470