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.

A071422 a(n) = a(n-1) + sum of decimal digits of sigma(n), the sum of divisors of n.

Table of values

n a(n)
1 1
2 4
3 8
4 15
5 21
6 24
7 32
8 38
9 42
10 51
11 54
12 64
13 69
14 75
15 81
16 85
17 94
18 106
19 108
20 114
21 119
22 128
23 134
24 140
25 144
26 150
27 154
28 165
29 168
30 177
31 182
32 191
33 203
34 212
35 224
36 234
37 245
38 251
39 262
40 271
41 277
42 292
43 300
44 312
45 327
46 336
47 348
48 355
49 367
50 379
51 388
52 405
53 414
54 417
55 426
56 429

List of values

[1, 4, 8, 15, 21, 24, 32, 38, 42, 51, 54, 64, 69, 75, 81, 85, 94, 106, 108, 114, 119, 128, 134, 140, 144, 150, 154, 165, 168, 177, 182, 191, 203, 212, 224, 234, 245, 251, 262, 271, 277, 292, 300, 312, 327, 336, 348, 355, 367, 379, 388, 405, 414, 417, 426, 429]