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.

A243172 Nonnegative integers of the form x^2 + 3*x*y - 3*y^2 (discriminant 21).

Table of values

n a(n)
1 0
2 1
3 4
4 7
5 9
6 15
7 16
8 25
9 28
10 36
11 37
12 43
13 49
14 51
15 60
16 63
17 64
18 67
19 79
20 81
21 85
22 100
23 105
24 109
25 112
26 121
27 123
28 127
29 135
30 141
31 144
32 148
33 151
34 163
35 169
36 172
37 175
38 177
39 193
40 196
41 204
42 205
43 211
44 225
45 235
46 240
47 249
48 252
49 256
50 259
51 267
52 268
53 277
54 289
55 295
56 301
57 303
58 316
59 324
60 331
61 333
62 337
63 340
64 343
65 357
66 361
67 373
68 375
69 379
70 387
71 393
72 400
73 415
74 420
75 421
76 436
77 441
78 445
79 448
80 457
81 459
82 463
83 469
84 484
85 487
86 492
87 499

List of values

[0, 1, 4, 7, 9, 15, 16, 25, 28, 36, 37, 43, 49, 51, 60, 63, 64, 67, 79, 81, 85, 100, 105, 109, 112, 121, 123, 127, 135, 141, 144, 148, 151, 163, 169, 172, 175, 177, 193, 196, 204, 205, 211, 225, 235, 240, 249, 252, 256, 259, 267, 268, 277, 289, 295, 301, 303, 316, 324, 331, 333, 337, 340, 343, 357, 361, 373, 375, 379, 387, 393, 400, 415, 420, 421, 436, 441, 445, 448, 457, 459, 463, 469, 484, 487, 492, 499]