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.

A153817 a(n)=Sum_{k=1..n} floor((n*k)/(n+k)).

Table of values

n a(n)
1 0
2 1
3 2
4 4
5 6
6 10
7 13
8 18
9 22
10 28
11 33
12 42
13 48
14 57
15 65
16 74
17 83
18 95
19 105
20 118
21 130
22 142
23 155
24 171
25 185
26 200
27 216
28 232
29 248
30 270
31 286
32 307
33 325
34 345
35 365
36 390
37 409
38 433
39 454
40 480
41 502
42 532
43 555
44 583
45 610
46 636
47 665
48 695
49 723
50 753
51 784
52 814
53 847
54 880
55 913
56 947
57 981

List of values

[0, 1, 2, 4, 6, 10, 13, 18, 22, 28, 33, 42, 48, 57, 65, 74, 83, 95, 105, 118, 130, 142, 155, 171, 185, 200, 216, 232, 248, 270, 286, 307, 325, 345, 365, 390, 409, 433, 454, 480, 502, 532, 555, 583, 610, 636, 665, 695, 723, 753, 784, 814, 847, 880, 913, 947, 981]