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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.

A256277 C(2*n,n) mod 2*n+1.

Table of values

n a(n)
1 2
2 1
3 6
4 7
5 10
6 1
7 12
8 1
9 18
10 19
11 22
12 6
13 11
14 1
15 30
16 9
17 15
18 1
19 15
20 1
21 42
22 15
23 46
24 29
25 36
26 1
27 27
28 55
29 58
30 1
31 14
32 19
33 66
34 21
35 70
36 1
37 32
38 35
39 78
40 43
41 82
42 40
43 60
44 1
45 7
46 60
47 70
48 1
49 18
50 1
51 102
52 96
53 106
54 1
55 39
56 1
57 17
58 96
59 3
60 111
61 84
62 31
63 126
64 84
65 130
66 37
67 30
68 1

List of values

[2, 1, 6, 7, 10, 1, 12, 1, 18, 19, 22, 6, 11, 1, 30, 9, 15, 1, 15, 1, 42, 15, 46, 29, 36, 1, 27, 55, 58, 1, 14, 19, 66, 21, 70, 1, 32, 35, 78, 43, 82, 40, 60, 1, 7, 60, 70, 1, 18, 1, 102, 96, 106, 1, 39, 1, 17, 96, 3, 111, 84, 31, 126, 84, 130, 37, 30, 1]

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