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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.

A013648 Numbers k such that the periodic part of the continued fraction for sqrt(k) contains a single 1.

Table of values

n a(n)
1 3
2 8
3 15
4 24
5 35
6 48
7 63
8 80
9 99
10 120
11 143
12 168
13 175
14 176
15 195
16 208
17 224
18 255
19 288
20 323
21 360
22 399
23 440
24 483
25 528
26 551
27 575
28 624
29 675
30 728
31 783
32 799
33 840
34 899
35 960
36 1023
37 1035
38 1088
39 1155
40 1224
41 1247
42 1295
43 1368
44 1403
45 1443
46 1520
47 1599
48 1680
49 1763
50 1848
51 1872

List of values

[3, 8, 15, 24, 35, 48, 63, 80, 99, 120, 143, 168, 175, 176, 195, 208, 224, 255, 288, 323, 360, 399, 440, 483, 528, 551, 575, 624, 675, 728, 783, 799, 840, 899, 960, 1023, 1035, 1088, 1155, 1224, 1247, 1295, 1368, 1403, 1443, 1520, 1599, 1680, 1763, 1848, 1872]

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

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