A299977 - cp's OEIS frontend

A299977 Lexicographic first sequence of positive integers such that a(n) + a(n+1) has a digit 7, and no term occurs twice.

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

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

cp's OEIS Frontend

A299977 Lexicographic first sequence of positive integers such that a(n) + a(n+1) has a digit 7, and no term occurs twice.

Table of values

List of values

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

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

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