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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.

A305311 Numbers k(n) used for Markoff forms determining quadratic irrationals with purely periodic continued fractions.

Table of values

n a(n)
1 2
2 5
3 12
4 31
5 70
6 81
7 212
8 408
9 463
10 555
11 1045
12 1453
13 2378
14 3157
15 3804
16 6914
17 9959
18 13860
19 15605
20 18045
21 21622
22 26073
23 35491
24 68260
25 80782
26 90903
27 103247
28 123042
29 148183
30 178707
31 233030
32 321983
33 470832
34 467861
35 703292
36 1015645
37 1205641
38 1224876
39 1541791
40 2205232

List of values

[2, 5, 12, 31, 70, 81, 212, 408, 463, 555, 1045, 1453, 2378, 3157, 3804, 6914, 9959, 13860, 15605, 18045, 21622, 26073, 35491, 68260, 80782, 90903, 103247, 123042, 148183, 178707, 233030, 321983, 470832, 467861, 703292, 1015645, 1205641, 1224876, 1541791, 2205232]

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

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