A299980 - cp's OEIS frontend

A299980 Lexicographic first sequence of positive integers such that a(n)*a(n+1) has a digit 0, and no term occurs twice.

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

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

cp's OEIS Frontend

A299980 Lexicographic first sequence of positive integers such that a(n)*a(n+1) has a digit 0, and no term occurs twice.

Table of values

List of values

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

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

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