A299974 - cp's OEIS frontend

A299974 Lexicographic first sequence of positive integers such that a(n) + a(n+1) has a digit 4, and no term occurs twice.

n	a(n)
1	1
2	3
3	11
4	13
5	21
6	19
7	5
8	9
9	15
10	25
11	16
12	8
13	6
14	18
15	22
16	2
17	12
18	28
19	14
20	10
21	4
22	20
23	23
24	17
25	7
26	27
27	37
28	47
29	57
30	67
31	73
32	31
33	33
34	41
35	43
36	51
37	53
38	61
39	63
40	71
41	69
42	35
43	29
44	45
45	39
46	55
47	49
48	65
49	59
50	75
51	66
52	38
53	26
54	48
55	36
56	58
57	46
58	68
59	56
60	78
61	62
62	32
63	42
64	52
65	72
66	70
67	24
68	30
69	34
70	40
71	44
72	50
73	54
74	60
75	64
76	76
77	88
78	86
79	98
80	96
81	108
82	106
83	118
84	116
85	124
86	80
87	74
88	90
89	84

[1, 3, 11, 13, 21, 19, 5, 9, 15, 25, 16, 8, 6, 18, 22, 2, 12, 28, 14, 10, 4, 20, 23, 17, 7, 27, 37, 47, 57, 67, 73, 31, 33, 41, 43, 51, 53, 61, 63, 71, 69, 35, 29, 45, 39, 55, 49, 65, 59, 75, 66, 38, 26, 48, 36, 58, 46, 68, 56, 78, 62, 32, 42, 52, 72, 70, 24, 30, 34, 40, 44, 50, 54, 60, 64, 76, 88, 86, 98, 96, 108, 106, 118, 116, 124, 80, 74, 90, 84]

cp's OEIS Frontend

A299974 Lexicographic first sequence of positive integers such that a(n) + a(n+1) has a digit 4, and no term occurs twice.

Table of values

List of values

n	a(n)
1	1
2	3
3	11
4	13
5	21
6	19
7	5
8	9
9	15
10	25
11	16
12	8
13	6
14	18
15	22
16	2
17	12
18	28
19	14
20	10
21	4
22	20
23	23
24	17
25	7
26	27
27	37
28	47
29	57
30	67
31	73
32	31
33	33
34	41
35	43
36	51
37	53
38	61
39	63
40	71
41	69
42	35
43	29
44	45
45	39
46	55
47	49
48	65
49	59
50	75
51	66
52	38
53	26
54	48
55	36
56	58
57	46
58	68
59	56
60	78
61	62
62	32
63	42
64	52
65	72
66	70
67	24
68	30
69	34
70	40
71	44
72	50
73	54
74	60
75	64
76	76
77	88
78	86
79	98
80	96
81	108
82	106
83	118
84	116
85	124
86	80
87	74
88	90
89	84

n	a(n)
1	1
2	3
3	11
4	13
5	21
6	19
7	5
8	9
9	15
10	25
11	16
12	8
13	6
14	18
15	22
16	2
17	12
18	28
19	14
20	10
21	4
22	20
23	23
24	17
25	7
26	27
27	37
28	47
29	57
30	67
31	73
32	31
33	33
34	41
35	43
36	51
37	53
38	61
39	63
40	71
41	69
42	35
43	29
44	45
45	39
46	55
47	49
48	65
49	59
50	75
51	66
52	38
53	26
54	48
55	36
56	58
57	46
58	68
59	56
60	78
61	62
62	32
63	42
64	52
65	72
66	70
67	24
68	30
69	34
70	40
71	44
72	50
73	54
74	60
75	64
76	76
77	88
78	86
79	98
80	96
81	108
82	106
83	118
84	116
85	124
86	80
87	74
88	90
89	84

n	a(n)
1	1
2	3
3	11
4	13
5	21
6	19
7	5
8	9
9	15
10	25
11	16
12	8
13	6
14	18
15	22
16	2
17	12
18	28
19	14
20	10
21	4
22	20
23	23
24	17
25	7
26	27
27	37
28	47
29	57
30	67
31	73
32	31
33	33
34	41
35	43
36	51
37	53
38	61
39	63
40	71
41	69
42	35
43	29
44	45
45	39
46	55
47	49
48	65
49	59
50	75
51	66
52	38
53	26
54	48
55	36
56	58
57	46
58	68
59	56
60	78
61	62
62	32
63	42
64	52
65	72
66	70
67	24
68	30
69	34
70	40
71	44
72	50
73	54
74	60
75	64
76	76
77	88
78	86
79	98
80	96
81	108
82	106
83	118
84	116
85	124
86	80
87	74
88	90
89	84