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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.

A226696 Discriminants D of indefinite binary quadratic forms (given in A079896) which allow a solution of the Pell equation x^2 - D*y^2 = -4.

Table of values

n a(n)
1 5
2 8
3 13
4 17
5 20
6 29
7 37
8 40
9 41
10 52
11 53
12 61
13 65
14 68
15 73
16 85
17 89
18 97
19 101
20 104
21 109
22 113
23 116
24 125
25 137
26 145
27 148
28 149
29 157
30 164
31 173
32 181
33 185
34 193
35 197
36 200
37 212
38 229
39 232
40 233
41 241
42 244
43 257
44 260
45 265
46 269
47 277
48 281
49 292
50 293
51 296
52 313
53 317
54 325
55 328

List of values

[5, 8, 13, 17, 20, 29, 37, 40, 41, 52, 53, 61, 65, 68, 73, 85, 89, 97, 101, 104, 109, 113, 116, 125, 137, 145, 148, 149, 157, 164, 173, 181, 185, 193, 197, 200, 212, 229, 232, 233, 241, 244, 257, 260, 265, 269, 277, 281, 292, 293, 296, 313, 317, 325, 328]

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

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