cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A109453 Cumulative sum of initial digits of n.

Table of values

n a(n)
1 1
2 3
3 6
4 10
5 15
6 21
7 28
8 36
9 45
10 46
11 47
12 48
13 49
14 50
15 51
16 52
17 53
18 54
19 55
20 57
21 59
22 61
23 63
24 65
25 67
26 69
27 71
28 73
29 75
30 78
31 81
32 84
33 87
34 90
35 93
36 96
37 99
38 102
39 105
40 109
41 113
42 117
43 121
44 125
45 129
46 133
47 137
48 141
49 145
50 150
51 155
52 160
53 165
54 170
55 175
56 180
57 185
58 190
59 195
60 201
61 207
62 213

List of values

[1, 3, 6, 10, 15, 21, 28, 36, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 78, 81, 84, 87, 90, 93, 96, 99, 102, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 201, 207, 213]