A299979 - cp's OEIS frontend

A299979 Lexicographic first sequence of positive integers such that a(n) + a(n+1) has a digit 9, and no term occurs twice.

n	a(n)
1	1
2	8
3	11
4	18
5	21
6	28
7	31
8	38
9	41
10	48
11	42
12	7
13	2
14	17
15	12
16	27
17	22
18	37
19	32
20	47
21	43
22	6
23	3
24	16
25	13
26	26
27	23
28	36
29	33
30	46
31	44
32	5
33	4
34	15
35	14
36	25
37	24
38	35
39	34
40	45
41	49
42	10
43	9
44	20
45	19
46	30
47	29
48	40
49	39
50	50
51	59
52	60
53	69
54	70
55	79
56	80
57	89
58	90
59	99
60	91
61	58
62	51
63	68
64	61
65	78
66	71
67	88
68	81
69	98
70	92
71	57
72	52
73	67
74	62
75	77
76	72
77	87
78	82
79	97
80	93
81	56
82	53
83	66
84	63
85	76
86	73
87	86
88	83
89	96
90	94
91	55

[1, 8, 11, 18, 21, 28, 31, 38, 41, 48, 42, 7, 2, 17, 12, 27, 22, 37, 32, 47, 43, 6, 3, 16, 13, 26, 23, 36, 33, 46, 44, 5, 4, 15, 14, 25, 24, 35, 34, 45, 49, 10, 9, 20, 19, 30, 29, 40, 39, 50, 59, 60, 69, 70, 79, 80, 89, 90, 99, 91, 58, 51, 68, 61, 78, 71, 88, 81, 98, 92, 57, 52, 67, 62, 77, 72, 87, 82, 97, 93, 56, 53, 66, 63, 76, 73, 86, 83, 96, 94, 55]

cp's OEIS Frontend

A299979 Lexicographic first sequence of positive integers such that a(n) + a(n+1) has a digit 9, and no term occurs twice.

Table of values

List of values

n	a(n)
1	1
2	8
3	11
4	18
5	21
6	28
7	31
8	38
9	41
10	48
11	42
12	7
13	2
14	17
15	12
16	27
17	22
18	37
19	32
20	47
21	43
22	6
23	3
24	16
25	13
26	26
27	23
28	36
29	33
30	46
31	44
32	5
33	4
34	15
35	14
36	25
37	24
38	35
39	34
40	45
41	49
42	10
43	9
44	20
45	19
46	30
47	29
48	40
49	39
50	50
51	59
52	60
53	69
54	70
55	79
56	80
57	89
58	90
59	99
60	91
61	58
62	51
63	68
64	61
65	78
66	71
67	88
68	81
69	98
70	92
71	57
72	52
73	67
74	62
75	77
76	72
77	87
78	82
79	97
80	93
81	56
82	53
83	66
84	63
85	76
86	73
87	86
88	83
89	96
90	94
91	55

n	a(n)
1	1
2	8
3	11
4	18
5	21
6	28
7	31
8	38
9	41
10	48
11	42
12	7
13	2
14	17
15	12
16	27
17	22
18	37
19	32
20	47
21	43
22	6
23	3
24	16
25	13
26	26
27	23
28	36
29	33
30	46
31	44
32	5
33	4
34	15
35	14
36	25
37	24
38	35
39	34
40	45
41	49
42	10
43	9
44	20
45	19
46	30
47	29
48	40
49	39
50	50
51	59
52	60
53	69
54	70
55	79
56	80
57	89
58	90
59	99
60	91
61	58
62	51
63	68
64	61
65	78
66	71
67	88
68	81
69	98
70	92
71	57
72	52
73	67
74	62
75	77
76	72
77	87
78	82
79	97
80	93
81	56
82	53
83	66
84	63
85	76
86	73
87	86
88	83
89	96
90	94
91	55

n	a(n)
1	1
2	8
3	11
4	18
5	21
6	28
7	31
8	38
9	41
10	48
11	42
12	7
13	2
14	17
15	12
16	27
17	22
18	37
19	32
20	47
21	43
22	6
23	3
24	16
25	13
26	26
27	23
28	36
29	33
30	46
31	44
32	5
33	4
34	15
35	14
36	25
37	24
38	35
39	34
40	45
41	49
42	10
43	9
44	20
45	19
46	30
47	29
48	40
49	39
50	50
51	59
52	60
53	69
54	70
55	79
56	80
57	89
58	90
59	99
60	91
61	58
62	51
63	68
64	61
65	78
66	71
67	88
68	81
69	98
70	92
71	57
72	52
73	67
74	62
75	77
76	72
77	87
78	82
79	97
80	93
81	56
82	53
83	66
84	63
85	76
86	73
87	86
88	83
89	96
90	94
91	55