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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.

A254746 a(n) = Catalan(n^2) mod prime(n).

Table of values

n a(n)
1 1
2 2
3 2
4 5
5 8
6 0
7 0
8 11
9 0
10 24
11 0
12 0
13 29
14 0
15 0
16 0
17 0
18 39
19 58
20 0
21 21
22 33
23 9
24 69
25 9
26 0
27 16
28 86
29 0
30 0
31 0
32 0
33 0
34 64
35 139
36 0
37 0
38 0
39 75
40 12
41 4
42 0
43 0
44 119
45 195
46 0
47 193
48 202
49 0
50 0
51 55
52 218
53 0
54 0
55 0
56 0
57 84
58 201
59 0
60 0
61 203
62 275
63 0
64 198
65 159
66 0
67 0
68 0
69 0
70 255
71 13
72 204
73 0

List of values

[1, 2, 2, 5, 8, 0, 0, 11, 0, 24, 0, 0, 29, 0, 0, 0, 0, 39, 58, 0, 21, 33, 9, 69, 9, 0, 16, 86, 0, 0, 0, 0, 0, 64, 139, 0, 0, 0, 75, 12, 4, 0, 0, 119, 195, 0, 193, 202, 0, 0, 55, 218, 0, 0, 0, 0, 84, 201, 0, 0, 203, 275, 0, 198, 159, 0, 0, 0, 0, 255, 13, 204, 0]

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

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