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.

A081619 Numbers whose divisors can be arranged as equilateral triangle.

Table of values

n a(n)
1 1
2 4
3 9
4 12
5 18
6 20
7 25
8 28
9 32
10 44
11 45
12 48
13 49
14 50
15 52
16 63
17 68
18 75
19 76
20 80
21 92
22 98
23 99
24 112
25 116
26 117
27 121
28 124
29 144
30 147
31 148
32 153
33 162
34 164
35 169
36 171
37 172
38 175
39 176
40 188
41 207
42 208
43 212
44 236
45 242
46 243
47 244
48 245
49 261
50 268
51 272
52 275
53 279
54 284
55 289
56 292
57 304
58 316

List of values

[1, 4, 9, 12, 18, 20, 25, 28, 32, 44, 45, 48, 49, 50, 52, 63, 68, 75, 76, 80, 92, 98, 99, 112, 116, 117, 121, 124, 144, 147, 148, 153, 162, 164, 169, 171, 172, 175, 176, 188, 207, 208, 212, 236, 242, 243, 244, 245, 261, 268, 272, 275, 279, 284, 289, 292, 304, 316]