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.

A339918 a(n) = Sum_{k=1..n} floor(3*n/k).

Table of values

n a(n)
0 0
1 3
2 9
3 16
4 25
5 33
6 43
7 53
8 64
9 73
10 86
11 96
12 110
13 118
14 133
15 145
16 158
17 169
18 182
19 196
20 211
21 221
22 237
23 247
24 266
25 276
26 291
27 306
28 321
29 331
30 350
31 362
32 379
33 391
34 407
35 423
36 438
37 450
38 467
39 481
40 502
41 511
42 530
43 542
44 561
45 575
46 590
47 606
48 626
49 638
50 655
51 669
52 690
53 698
54 721

List of values

[0, 3, 9, 16, 25, 33, 43, 53, 64, 73, 86, 96, 110, 118, 133, 145, 158, 169, 182, 196, 211, 221, 237, 247, 266, 276, 291, 306, 321, 331, 350, 362, 379, 391, 407, 423, 438, 450, 467, 481, 502, 511, 530, 542, 561, 575, 590, 606, 626, 638, 655, 669, 690, 698, 721]