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.

A002088 Sum of totient function: a(n) = Sum_{k=1..n} phi(k), cf. A000010.

Table of values

n a(n)
0 0
1 1
2 2
3 4
4 6
5 10
6 12
7 18
8 22
9 28
10 32
11 42
12 46
13 58
14 64
15 72
16 80
17 96
18 102
19 120
20 128
21 140
22 150
23 172
24 180
25 200
26 212
27 230
28 242
29 270
30 278
31 308
32 324
33 344
34 360
35 384
36 396
37 432
38 450
39 474
40 490
41 530
42 542
43 584
44 604
45 628
46 650
47 696
48 712
49 754
50 774
51 806
52 830
53 882
54 900
55 940
56 964

List of values

[0, 1, 2, 4, 6, 10, 12, 18, 22, 28, 32, 42, 46, 58, 64, 72, 80, 96, 102, 120, 128, 140, 150, 172, 180, 200, 212, 230, 242, 270, 278, 308, 324, 344, 360, 384, 396, 432, 450, 474, 490, 530, 542, 584, 604, 628, 650, 696, 712, 754, 774, 806, 830, 882, 900, 940, 964]