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.

A189553 Irregular triangle in which row n contains numbers x such that x'=n, where x' denotes the arithmetic derivative (A003415).

Table of values

n a(n)
4 4
5 6
6 9
7 10
8 15
9 14
10 21
11 25
12 8
13 35
14 22
15 33
16 49
17 26
18 12
19 39
20 55
21 65
22 77
23 34
24 51
25 91
26 18
27 38
28 57
29 85
30 121
31 20
32 95
33 119
34 143
35 46
36 69
37 133
38 169
39 27
40 115
41 187
42 161
43 209
44 221
45 30
46 58
47 16
48 28
49 87
50 247
51 62
52 93
53 145
54 253
55 289
56 155
57 203
58 299
59 323
60 217
61 361
62 45
63 74

List of values

[4, 6, 9, 10, 15, 14, 21, 25, 8, 35, 22, 33, 49, 26, 12, 39, 55, 65, 77, 34, 51, 91, 18, 38, 57, 85, 121, 20, 95, 119, 143, 46, 69, 133, 169, 27, 115, 187, 161, 209, 221, 30, 58, 16, 28, 87, 247, 62, 93, 145, 253, 289, 155, 203, 299, 323, 217, 361, 45, 74]

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

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