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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.

A057434 a(n) = Sum_{k=1..n} phi(k)^2.

Table of values

n a(n)
1 1
2 2
3 6
4 10
5 26
6 30
7 66
8 82
9 118
10 134
11 234
12 250
13 394
14 430
15 494
16 558
17 814
18 850
19 1174
20 1238
21 1382
22 1482
23 1966
24 2030
25 2430
26 2574
27 2898
28 3042
29 3826
30 3890
31 4790
32 5046
33 5446
34 5702
35 6278
36 6422
37 7718
38 8042
39 8618
40 8874
41 10474
42 10618
43 12382
44 12782

List of values

[1, 2, 6, 10, 26, 30, 66, 82, 118, 134, 234, 250, 394, 430, 494, 558, 814, 850, 1174, 1238, 1382, 1482, 1966, 2030, 2430, 2574, 2898, 3042, 3826, 3890, 4790, 5046, 5446, 5702, 6278, 6422, 7718, 8042, 8618, 8874, 10474, 10618, 12382, 12782]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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