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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.

A008315 Catalan triangle read by rows. Also triangle of expansions of powers of x in terms of Chebyshev polynomials U_n(x).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 2
6 1
7 3
8 2
9 1
10 4
11 5
12 1
13 5
14 9
15 5
16 1
17 6
18 14
19 14
20 1
21 7
22 20
23 28
24 14
25 1
26 8
27 27
28 48
29 42
30 1
31 9
32 35
33 75
34 90
35 42
36 1
37 10
38 44
39 110
40 165
41 132
42 1
43 11
44 54
45 154
46 275
47 297
48 132
49 1
50 12
51 65
52 208
53 429
54 572
55 429
56 1
57 13
58 77
59 273
60 637
61 1001
62 1001
63 429
64 1
65 14
66 90
67 350
68 910
69 1638
70 2002
71 1430
72 1
73 15
74 104

List of values

[1, 1, 1, 1, 1, 2, 1, 3, 2, 1, 4, 5, 1, 5, 9, 5, 1, 6, 14, 14, 1, 7, 20, 28, 14, 1, 8, 27, 48, 42, 1, 9, 35, 75, 90, 42, 1, 10, 44, 110, 165, 132, 1, 11, 54, 154, 275, 297, 132, 1, 12, 65, 208, 429, 572, 429, 1, 13, 77, 273, 637, 1001, 1001, 429, 1, 14, 90, 350, 910, 1638, 2002, 1430, 1, 15, 104]