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.

A366967 a(n) = Sum_{k=2..n} binomial(k,2) * floor(n/k).

Table of values

n a(n)
1 0
2 1
3 4
4 11
5 21
6 40
7 61
8 96
9 135
10 191
11 246
12 337
13 415
14 528
15 646
16 801
17 937
18 1145
19 1316
20 1568
21 1802
22 2089
23 2342
24 2737
25 3047
26 3451
27 3841
28 4338
29 4744
30 5358
31 5823
32 6474
33 7060
34 7758
35 8384
36 9294
37 9960
38 10835
39 11657
40 12717
41 13537
42 14739
43 15642
44 16881
45 18025
46 19314
47 20395

List of values

[0, 1, 4, 11, 21, 40, 61, 96, 135, 191, 246, 337, 415, 528, 646, 801, 937, 1145, 1316, 1568, 1802, 2089, 2342, 2737, 3047, 3451, 3841, 4338, 4744, 5358, 5823, 6474, 7060, 7758, 8384, 9294, 9960, 10835, 11657, 12717, 13537, 14739, 15642, 16881, 18025, 19314, 20395]