A253251 - cp's OEIS frontend

A253251 a(1) = 1, and for n > 0, a(n+1) = a(n) + floor(10^k/a(n)), where k is the least integer such that 10^k >= a(n).

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	11
8	20
9	25
10	29
11	32
12	35
13	37
14	39
15	41
16	43
17	45
18	47
19	49
20	51
21	52
22	53
23	54
24	55
25	56
26	57
27	58
28	59
29	60
30	61
31	62
32	63
33	64
34	65
35	66
36	67
37	68
38	69
39	70
40	71
41	72
42	73
43	74
44	75
45	76
46	77
47	78
48	79
49	80
50	81
51	82
52	83
53	84
54	85
55	86
56	87
57	88
58	89
59	90
60	91
61	92
62	93
63	94
64	95
65	96
66	97
67	98
68	99
69	100
70	101

[1, 2, 7, 8, 9, 10, 11, 20, 25, 29, 32, 35, 37, 39, 41, 43, 45, 47, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101]

cp's OEIS Frontend

A253251 a(1) = 1, and for n > 0, a(n+1) = a(n) + floor(10^k/a(n)), where k is the least integer such that 10^k >= a(n).

Table of values

List of values

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	11
8	20
9	25
10	29
11	32
12	35
13	37
14	39
15	41
16	43
17	45
18	47
19	49
20	51
21	52
22	53
23	54
24	55
25	56
26	57
27	58
28	59
29	60
30	61
31	62
32	63
33	64
34	65
35	66
36	67
37	68
38	69
39	70
40	71
41	72
42	73
43	74
44	75
45	76
46	77
47	78
48	79
49	80
50	81
51	82
52	83
53	84
54	85
55	86
56	87
57	88
58	89
59	90
60	91
61	92
62	93
63	94
64	95
65	96
66	97
67	98
68	99
69	100
70	101

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	11
8	20
9	25
10	29
11	32
12	35
13	37
14	39
15	41
16	43
17	45
18	47
19	49
20	51
21	52
22	53
23	54
24	55
25	56
26	57
27	58
28	59
29	60
30	61
31	62
32	63
33	64
34	65
35	66
36	67
37	68
38	69
39	70
40	71
41	72
42	73
43	74
44	75
45	76
46	77
47	78
48	79
49	80
50	81
51	82
52	83
53	84
54	85
55	86
56	87
57	88
58	89
59	90
60	91
61	92
62	93
63	94
64	95
65	96
66	97
67	98
68	99
69	100
70	101

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	11
8	20
9	25
10	29
11	32
12	35
13	37
14	39
15	41
16	43
17	45
18	47
19	49
20	51
21	52
22	53
23	54
24	55
25	56
26	57
27	58
28	59
29	60
30	61
31	62
32	63
33	64
34	65
35	66
36	67
37	68
38	69
39	70
40	71
41	72
42	73
43	74
44	75
45	76
46	77
47	78
48	79
49	80
50	81
51	82
52	83
53	84
54	85
55	86
56	87
57	88
58	89
59	90
60	91
61	92
62	93
63	94
64	95
65	96
66	97
67	98
68	99
69	100
70	101