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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.

A258857 Seventh pi-based arithmetic derivative of n.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 4
5 0
6 4
7 4
8 2304
9 2304
10 0
11 0
12 12288
13 4
14 80
15 208
16 81920
17 4
18 208
19 512
20 81920
21 80
22 32
23 512
24 16092
25 512
26 208
27 138240
28 30848
29 0
30 2304
31 0
32 622592
33 512
34 0
35 4
36 3000
37 2304
38 4
39 30848
40 3000
41 4
42 16
43 32
44 114752
45 2160
46 4
47 80
48 772352
49 936
50 208
51 332
52 52056
53 12288

List of values

[0, 0, 0, 0, 4, 0, 4, 4, 2304, 2304, 0, 0, 12288, 4, 80, 208, 81920, 4, 208, 512, 81920, 80, 32, 512, 16092, 512, 208, 138240, 30848, 0, 2304, 0, 622592, 512, 0, 4, 3000, 2304, 4, 30848, 3000, 4, 16, 32, 114752, 2160, 4, 80, 772352, 936, 208, 332, 52056, 12288]

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