A369303 - cp's OEIS frontend

A369303 a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest unused number whose string value contains the comma transform (cf. A367360) of the previous two terms.

n	a(n)
1	1
2	2
3	12
4	21
5	22
6	112
7	121
8	210
9	120
10	10
11	11
12	13
13	110
14	31
15	3
16	113
17	131
18	231
19	122
20	111
21	211
22	123
23	114
24	310
25	43
26	4
27	34
28	143
29	41
30	134
31	115
32	141
33	51
34	15
35	116
36	151
37	61
38	16
39	117
40	161
41	71
42	17
43	118
44	171
45	81
46	18
47	119
48	181
49	91
50	19
51	311
52	93
53	190
54	312
55	23
56	220
57	32
58	30
59	223
60	20
61	132
62	14
63	212
64	42
65	24
66	221

[1, 2, 12, 21, 22, 112, 121, 210, 120, 10, 11, 13, 110, 31, 3, 113, 131, 231, 122, 111, 211, 123, 114, 310, 43, 4, 34, 143, 41, 134, 115, 141, 51, 15, 116, 151, 61, 16, 117, 161, 71, 17, 118, 171, 81, 18, 119, 181, 91, 19, 311, 93, 190, 312, 23, 220, 32, 30, 223, 20, 132, 14, 212, 42, 24, 221]

cp's OEIS Frontend

A369303 a(1) = 1, a(2) = 2; for n > 2, a(n) is the smallest unused number whose string value contains the comma transform (cf. A367360) of the previous two terms.

Table of values

List of values

n	a(n)
1	1
2	2
3	12
4	21
5	22
6	112
7	121
8	210
9	120
10	10
11	11
12	13
13	110
14	31
15	3
16	113
17	131
18	231
19	122
20	111
21	211
22	123
23	114
24	310
25	43
26	4
27	34
28	143
29	41
30	134
31	115
32	141
33	51
34	15
35	116
36	151
37	61
38	16
39	117
40	161
41	71
42	17
43	118
44	171
45	81
46	18
47	119
48	181
49	91
50	19
51	311
52	93
53	190
54	312
55	23
56	220
57	32
58	30
59	223
60	20
61	132
62	14
63	212
64	42
65	24
66	221

n	a(n)
1	1
2	2
3	12
4	21
5	22
6	112
7	121
8	210
9	120
10	10
11	11
12	13
13	110
14	31
15	3
16	113
17	131
18	231
19	122
20	111
21	211
22	123
23	114
24	310
25	43
26	4
27	34
28	143
29	41
30	134
31	115
32	141
33	51
34	15
35	116
36	151
37	61
38	16
39	117
40	161
41	71
42	17
43	118
44	171
45	81
46	18
47	119
48	181
49	91
50	19
51	311
52	93
53	190
54	312
55	23
56	220
57	32
58	30
59	223
60	20
61	132
62	14
63	212
64	42
65	24
66	221

n	a(n)
1	1
2	2
3	12
4	21
5	22
6	112
7	121
8	210
9	120
10	10
11	11
12	13
13	110
14	31
15	3
16	113
17	131
18	231
19	122
20	111
21	211
22	123
23	114
24	310
25	43
26	4
27	34
28	143
29	41
30	134
31	115
32	141
33	51
34	15
35	116
36	151
37	61
38	16
39	117
40	161
41	71
42	17
43	118
44	171
45	81
46	18
47	119
48	181
49	91
50	19
51	311
52	93
53	190
54	312
55	23
56	220
57	32
58	30
59	223
60	20
61	132
62	14
63	212
64	42
65	24
66	221