A374253 - cp's OEIS frontend

A374253 Numbers k such that the k-th composition in standard order matches the patterns (1,2,1) or (2,1,2).

n	a(n)
1	13
2	22
3	25
4	27
5	29
6	45
7	46
8	49
9	51
10	53
11	54
12	55
13	57
14	59
15	61
16	76
17	77
18	82
19	86
20	89
21	90
22	91
23	93
24	94
25	97
26	99
27	101
28	102
29	103
30	105
31	107
32	108
33	109
34	110
35	111
36	113
37	115
38	117
39	118
40	119
41	121
42	123
43	125
44	141
45	148
46	150
47	153
48	155
49	156
50	157
51	162
52	165
53	166
54	173
55	174
56	177
57	178

[13, 22, 25, 27, 29, 45, 46, 49, 51, 53, 54, 55, 57, 59, 61, 76, 77, 82, 86, 89, 90, 91, 93, 94, 97, 99, 101, 102, 103, 105, 107, 108, 109, 110, 111, 113, 115, 117, 118, 119, 121, 123, 125, 141, 148, 150, 153, 155, 156, 157, 162, 165, 166, 173, 174, 177, 178]

cp's OEIS Frontend

A374253 Numbers k such that the k-th composition in standard order matches the patterns (1,2,1) or (2,1,2).

Table of values

List of values

n	a(n)
1	13
2	22
3	25
4	27
5	29
6	45
7	46
8	49
9	51
10	53
11	54
12	55
13	57
14	59
15	61
16	76
17	77
18	82
19	86
20	89
21	90
22	91
23	93
24	94
25	97
26	99
27	101
28	102
29	103
30	105
31	107
32	108
33	109
34	110
35	111
36	113
37	115
38	117
39	118
40	119
41	121
42	123
43	125
44	141
45	148
46	150
47	153
48	155
49	156
50	157
51	162
52	165
53	166
54	173
55	174
56	177
57	178

n	a(n)
1	13
2	22
3	25
4	27
5	29
6	45
7	46
8	49
9	51
10	53
11	54
12	55
13	57
14	59
15	61
16	76
17	77
18	82
19	86
20	89
21	90
22	91
23	93
24	94
25	97
26	99
27	101
28	102
29	103
30	105
31	107
32	108
33	109
34	110
35	111
36	113
37	115
38	117
39	118
40	119
41	121
42	123
43	125
44	141
45	148
46	150
47	153
48	155
49	156
50	157
51	162
52	165
53	166
54	173
55	174
56	177
57	178

n	a(n)
1	13
2	22
3	25
4	27
5	29
6	45
7	46
8	49
9	51
10	53
11	54
12	55
13	57
14	59
15	61
16	76
17	77
18	82
19	86
20	89
21	90
22	91
23	93
24	94
25	97
26	99
27	101
28	102
29	103
30	105
31	107
32	108
33	109
34	110
35	111
36	113
37	115
38	117
39	118
40	119
41	121
42	123
43	125
44	141
45	148
46	150
47	153
48	155
49	156
50	157
51	162
52	165
53	166
54	173
55	174
56	177
57	178