A342264 - cp's OEIS frontend

A342264 Lexicographically earliest sequence of distinct nonnegative terms such that both a(n) and a(n) + a(n+1) have digits in nondecreasing order.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	13
12	11
13	12
14	14
15	15
16	18
17	16
18	17
19	19
20	25
21	22
22	23
23	24
24	33
25	26
26	29
27	27
28	28
29	38
30	39
31	49
32	66
33	45
34	34
35	35
36	44
37	55
38	56
39	57
40	58
41	59
42	67
43	46
44	68
45	47
46	69
47	48
48	77
49	36
50	78
51	37
52	79
53	88
54	89
55	99
56	123
57	111
58	112
59	113
60	114
61	115
62	118
63	116
64	117
65	119
66	125
67	122
68	124
69	133
70	126
71	129
72	127
73	128
74	138

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 11, 12, 14, 15, 18, 16, 17, 19, 25, 22, 23, 24, 33, 26, 29, 27, 28, 38, 39, 49, 66, 45, 34, 35, 44, 55, 56, 57, 58, 59, 67, 46, 68, 47, 69, 48, 77, 36, 78, 37, 79, 88, 89, 99, 123, 111, 112, 113, 114, 115, 118, 116, 117, 119, 125, 122, 124, 133, 126, 129, 127, 128, 138]

cp's OEIS Frontend

A342264 Lexicographically earliest sequence of distinct nonnegative terms such that both a(n) and a(n) + a(n+1) have digits in nondecreasing order.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	13
12	11
13	12
14	14
15	15
16	18
17	16
18	17
19	19
20	25
21	22
22	23
23	24
24	33
25	26
26	29
27	27
28	28
29	38
30	39
31	49
32	66
33	45
34	34
35	35
36	44
37	55
38	56
39	57
40	58
41	59
42	67
43	46
44	68
45	47
46	69
47	48
48	77
49	36
50	78
51	37
52	79
53	88
54	89
55	99
56	123
57	111
58	112
59	113
60	114
61	115
62	118
63	116
64	117
65	119
66	125
67	122
68	124
69	133
70	126
71	129
72	127
73	128
74	138

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	13
12	11
13	12
14	14
15	15
16	18
17	16
18	17
19	19
20	25
21	22
22	23
23	24
24	33
25	26
26	29
27	27
28	28
29	38
30	39
31	49
32	66
33	45
34	34
35	35
36	44
37	55
38	56
39	57
40	58
41	59
42	67
43	46
44	68
45	47
46	69
47	48
48	77
49	36
50	78
51	37
52	79
53	88
54	89
55	99
56	123
57	111
58	112
59	113
60	114
61	115
62	118
63	116
64	117
65	119
66	125
67	122
68	124
69	133
70	126
71	129
72	127
73	128
74	138

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	13
12	11
13	12
14	14
15	15
16	18
17	16
18	17
19	19
20	25
21	22
22	23
23	24
24	33
25	26
26	29
27	27
28	28
29	38
30	39
31	49
32	66
33	45
34	34
35	35
36	44
37	55
38	56
39	57
40	58
41	59
42	67
43	46
44	68
45	47
46	69
47	48
48	77
49	36
50	78
51	37
52	79
53	88
54	89
55	99
56	123
57	111
58	112
59	113
60	114
61	115
62	118
63	116
64	117
65	119
66	125
67	122
68	124
69	133
70	126
71	129
72	127
73	128
74	138