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.

A270543 Number of ordered pairs (i,j) of integers with |i|, |j| <= n, |i * j| <= n, and i even.

Table of values

n a(n)
0 1
1 3
2 11
3 13
4 25
5 27
6 39
7 41
8 57
9 59
10 71
11 73
12 93
13 95
14 107
15 109
16 129
17 131
18 147
19 149
20 169
21 171
22 183
23 185
24 213
25 215
26 227
27 229
28 249
29 251
30 271
31 273
32 297
33 299
34 311
35 313
36 341
37 343
38 355
39 357
40 385
41 387
42 407
43 409
44 429
45 431
46 443
47 445
48 481
49 483
50 499
51 501
52 521
53 523
54 543
55 545

List of values

[1, 3, 11, 13, 25, 27, 39, 41, 57, 59, 71, 73, 93, 95, 107, 109, 129, 131, 147, 149, 169, 171, 183, 185, 213, 215, 227, 229, 249, 251, 271, 273, 297, 299, 311, 313, 341, 343, 355, 357, 385, 387, 407, 409, 429, 431, 443, 445, 481, 483, 499, 501, 521, 523, 543, 545]