A299981 - cp's OEIS frontend

A299981 Lexicographic first sequence of positive integers such that a(n)*a(n+1) has a digit 1, and no term occurs twice.

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

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

cp's OEIS Frontend

A299981 Lexicographic first sequence of positive integers such that a(n)*a(n+1) has a digit 1, and no term occurs twice.

Table of values

List of values

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

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

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