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.

A372518 Positive numbers primitively represented by the indefinite quadratic form x^2 + 13xy - 9y^2.

Table of values

n a(n)
1 1
2 5
3 21
4 39
5 51
6 59
7 81
8 91
9 105
10 119
11 131
12 139
13 141
14 159
15 189
16 195
17 201
18 221
19 241
20 255
21 269
22 271
23 279
24 291
25 295
26 329
27 351
28 359
29 369
30 371
31 405
32 409
33 411
34 441
35 455
36 459
37 469
38 471
39 501
40 541
41 549
42 569
43 579
44 595
45 599
46 611
47 651
48 655
49 661
50 679
51 681
52 689
53 695
54 699

List of values

[1, 5, 21, 39, 51, 59, 81, 91, 105, 119, 131, 139, 141, 159, 189, 195, 201, 221, 241, 255, 269, 271, 279, 291, 295, 329, 351, 359, 369, 371, 405, 409, 411, 441, 455, 459, 469, 471, 501, 541, 549, 569, 579, 595, 599, 611, 651, 655, 661, 679, 681, 689, 695, 699]