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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.

A065005 Integers for which the periodic part of the continued fraction for the square root of n begins with 2.

Table of values

n a(n)
1 2
2 6
3 12
4 19
5 20
6 29
7 30
8 41
9 42
10 54
11 55
12 56
13 70
14 71
15 72
16 88
17 89
18 90
19 107
20 108
21 109
22 110
23 129
24 130
25 131
26 132
27 153
28 154
29 155
30 156
31 178
32 179
33 180
34 181
35 182
36 206
37 207
38 208
39 209
40 210
41 236
42 237
43 238
44 239
45 240
46 267
47 268
48 269
49 270
50 271
51 272
52 301
53 302
54 303
55 304
56 305

List of values

[2, 6, 12, 19, 20, 29, 30, 41, 42, 54, 55, 56, 70, 71, 72, 88, 89, 90, 107, 108, 109, 110, 129, 130, 131, 132, 153, 154, 155, 156, 178, 179, 180, 181, 182, 206, 207, 208, 209, 210, 236, 237, 238, 239, 240, 267, 268, 269, 270, 271, 272, 301, 302, 303, 304, 305]

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

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