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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.

A031688 Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 100.

Table of values

n a(n)
1 2501
2 123953
3 203482
4 204385
5 206197
6 304825
7 425273
8 568741
9 726193
10 727898
11 734738
12 906665
13 1119805
14 1124041
15 1334554
16 1341493
17 1346129
18 1565626
19 1568129
20 1570634
21 1573141
22 1578161
23 1580674
24 1583189
25 1590746
26 1593269
27 1828633
28 2126605
29 2138285
30 2144137

List of values

[2501, 123953, 203482, 204385, 206197, 304825, 425273, 568741, 726193, 727898, 734738, 906665, 1119805, 1124041, 1334554, 1341493, 1346129, 1565626, 1568129, 1570634, 1573141, 1578161, 1580674, 1583189, 1590746, 1593269, 1828633, 2126605, 2138285, 2144137]

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

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