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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.

A309376 a(n) appears in the congruences modulo 4 or 32 of Markoff numbers m(n) = A002559(n) for odd or even m(n).

Table of values

n a(n)
1 0
2 0
3 1
4 3
5 7
6 1
7 22
8 42
9 6
10 58
11 108
12 19
13 246
14 331
15 399
16 724
17 1045
18 1435
19 202
20 1890
21 2269
22 342
23 3675
24 7164
25 8365
26 1177
27 10815
28 12910
29 1944
30 18756
31 24139
32 33784
33 48756
34 6138
35 73671
36 106597
37 124848
38 128557
39 20188
40 231441
41 284172
42 39963
43 336567
44 360472
45 421512
46 62896
47 605881
48 730627
49 819127
50 110143
51 1100122
52 1656277
53 232918
54 2099832
55 2306866
56 2411752
57 358911
58 3445662

List of values

[0, 0, 1, 3, 7, 1, 22, 42, 6, 58, 108, 19, 246, 331, 399, 724, 1045, 1435, 202, 1890, 2269, 342, 3675, 7164, 8365, 1177, 10815, 12910, 1944, 18756, 24139, 33784, 48756, 6138, 73671, 106597, 124848, 128557, 20188, 231441, 284172, 39963, 336567, 360472, 421512, 62896, 605881, 730627, 819127, 110143, 1100122, 1656277, 232918, 2099832, 2306866, 2411752, 358911, 3445662]

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