A098727 - cp's OEIS frontend

A098727 Consider the sequence {b(n), n >= 1} of digits of the natural (or counting) numbers: 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A007376); a(n) = b(n) + n.

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

[2, 4, 6, 8, 10, 12, 14, 16, 18, 11, 11, 13, 14, 15, 17, 17, 20, 19, 23, 21, 26, 23, 29, 25, 32, 27, 35, 29, 38, 32, 31, 34, 34, 36, 37, 38, 40, 40, 43, 42, 46, 44, 49, 46, 52, 48, 55, 50, 58, 53, 51, 55, 54, 57, 57, 59, 60, 61, 63, 63, 66, 65, 69, 67, 72, 69, 75, 71, 78, 74, 71]

cp's OEIS Frontend

A098727 Consider the sequence {b(n), n >= 1} of digits of the natural (or counting) numbers: 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0... (A007376); a(n) = b(n) + n.

Table of values

List of values

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

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

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