A084383 - cp's OEIS frontend

A084383 a(0)=0; for n>0, a(n) = smallest number that is not a concatenation of any number of distinct earlier terms in increasing order.

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	20
13	21
14	22
15	30
16	31
17	32
18	33
19	40
20	41
21	42
22	43
23	44
24	50
25	51
26	52
27	53
28	54
29	55
30	60
31	61
32	62
33	63
34	64
35	65
36	66
37	70
38	71
39	72
40	73
41	74
42	75
43	76
44	77
45	80
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	90
55	91
56	92
57	93
58	94
59	95
60	96
61	97
62	98
63	99
64	100
65	101
66	102
67	103
68	104
69	105
70	106
71	107
72	108
73	109
74	112
75	113
76	114
77	115
78	116
79	117
80	118
81	119
82	200
83	201
84	202

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 21, 22, 30, 31, 32, 33, 40, 41, 42, 43, 44, 50, 51, 52, 53, 54, 55, 60, 61, 62, 63, 64, 65, 66, 70, 71, 72, 73, 74, 75, 76, 77, 80, 81, 82, 83, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 112, 113, 114, 115, 116, 117, 118, 119, 200, 201, 202]

cp's OEIS Frontend

A084383 a(0)=0; for n>0, a(n) = smallest number that is not a concatenation of any number of distinct earlier terms in increasing order.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	20
13	21
14	22
15	30
16	31
17	32
18	33
19	40
20	41
21	42
22	43
23	44
24	50
25	51
26	52
27	53
28	54
29	55
30	60
31	61
32	62
33	63
34	64
35	65
36	66
37	70
38	71
39	72
40	73
41	74
42	75
43	76
44	77
45	80
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	90
55	91
56	92
57	93
58	94
59	95
60	96
61	97
62	98
63	99
64	100
65	101
66	102
67	103
68	104
69	105
70	106
71	107
72	108
73	109
74	112
75	113
76	114
77	115
78	116
79	117
80	118
81	119
82	200
83	201
84	202

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	20
13	21
14	22
15	30
16	31
17	32
18	33
19	40
20	41
21	42
22	43
23	44
24	50
25	51
26	52
27	53
28	54
29	55
30	60
31	61
32	62
33	63
34	64
35	65
36	66
37	70
38	71
39	72
40	73
41	74
42	75
43	76
44	77
45	80
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	90
55	91
56	92
57	93
58	94
59	95
60	96
61	97
62	98
63	99
64	100
65	101
66	102
67	103
68	104
69	105
70	106
71	107
72	108
73	109
74	112
75	113
76	114
77	115
78	116
79	117
80	118
81	119
82	200
83	201
84	202

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	11
12	20
13	21
14	22
15	30
16	31
17	32
18	33
19	40
20	41
21	42
22	43
23	44
24	50
25	51
26	52
27	53
28	54
29	55
30	60
31	61
32	62
33	63
34	64
35	65
36	66
37	70
38	71
39	72
40	73
41	74
42	75
43	76
44	77
45	80
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	90
55	91
56	92
57	93
58	94
59	95
60	96
61	97
62	98
63	99
64	100
65	101
66	102
67	103
68	104
69	105
70	106
71	107
72	108
73	109
74	112
75	113
76	114
77	115
78	116
79	117
80	118
81	119
82	200
83	201
84	202