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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.

A229848 Values of n such that the equation x^2 - 3*n*y^2 = n has integer solutions.

Table of values

n a(n)
1 1
2 4
3 7
4 9
5 13
6 16
7 19
8 25
9 28
10 31
11 36
12 37
13 43
14 49
15 52
16 61
17 63
18 64
19 67
20 76
21 79
22 81
23 91
24 100
25 103
26 109
27 112
28 117
29 121
30 124
31 127
32 139
33 144
34 148
35 151
36 157
37 163
38 169
39 171
40 172
41 175
42 181
43 193
44 196
45 199
46 208
47 211
48 217
49 223
50 225
51 229
52 244
53 247
54 252
55 256
56 268
57 271

List of values

[1, 4, 7, 9, 13, 16, 19, 25, 28, 31, 36, 37, 43, 49, 52, 61, 63, 64, 67, 76, 79, 81, 91, 100, 103, 109, 112, 117, 121, 124, 127, 139, 144, 148, 151, 157, 163, 169, 171, 172, 175, 181, 193, 196, 199, 208, 211, 217, 223, 225, 229, 244, 247, 252, 256, 268, 271]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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