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.

A055719 d(n)-1 | n and n is not prime.

Table of values

n a(n)
1 4
2 6
3 15
4 16
5 20
6 21
7 27
8 33
9 39
10 42
11 45
12 50
13 51
14 56
15 57
16 69
17 70
18 75
19 87
20 93
21 105
22 111
23 120
24 123
25 129
26 132
27 141
28 154
29 159
30 162
31 175
32 177
33 182
34 183
35 189
36 198
37 201
38 210
39 213
40 219
41 220
42 231
43 237
44 238
45 245
46 249
47 256
48 266
49 267
50 270
51 273
52 275
53 291
54 303
55 308
56 309
57 321

List of values

[4, 6, 15, 16, 20, 21, 27, 33, 39, 42, 45, 50, 51, 56, 57, 69, 70, 75, 87, 93, 105, 111, 120, 123, 129, 132, 141, 154, 159, 162, 175, 177, 182, 183, 189, 198, 201, 210, 213, 219, 220, 231, 237, 238, 245, 249, 256, 266, 267, 270, 273, 275, 291, 303, 308, 309, 321]