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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.

A273167 Numerators of coefficient triangle for expansion of x^(2*n) in terms of Chebyshev polynomials of the first kind T(2*m, x) (A127674).

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 1
5 1
6 5
7 15
8 3
9 1
10 35
11 7
12 7
13 1
14 1
15 63
16 105
17 15
18 45
19 5
20 1
21 231
22 99
23 495
24 55
25 33
26 3
27 1
28 429
29 3003
30 1001
31 1001
32 91
33 91
34 7
35 1
36 6435
37 715
38 1001
39 273
40 455
41 35
42 15
43 1
44 1
45 12155
46 21879
47 1989
48 4641
49 1071
50 765
51 51
52 153
53 9
54 1
55 46189
56 20995
57 62985
58 4845
59 4845
60 969
61 4845
62 285
63 95
64 5
65 1

List of values

[1, 1, 1, 3, 1, 1, 5, 15, 3, 1, 35, 7, 7, 1, 1, 63, 105, 15, 45, 5, 1, 231, 99, 495, 55, 33, 3, 1, 429, 3003, 1001, 1001, 91, 91, 7, 1, 6435, 715, 1001, 273, 455, 35, 15, 1, 1, 12155, 21879, 1989, 4641, 1071, 765, 51, 153, 9, 1, 46189, 20995, 62985, 4845, 4845, 969, 4845, 285, 95, 5, 1]