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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.

A356205 T(n,k) are the numerators of the coefficients of the Legendre polynomials of degree n, with increasing exponents, where T(n,k) is a triangle read by rows.

Table of values

n a(n)
0 1
1 0
2 1
3 -1
4 0
5 3
6 0
7 -3
8 0
9 5
10 3
11 0
12 -15
13 0
14 35
15 0
16 15
17 0
18 -35
19 0
20 63
21 -5
22 0
23 105
24 0
25 -315
26 0
27 231
28 0
29 -35
30 0
31 315
32 0
33 -693
34 0
35 429
36 35
37 0
38 -315
39 0
40 3465
41 0
42 -3003
43 0
44 6435
45 0
46 315
47 0
48 -1155
49 0
50 9009
51 0
52 -6435
53 0
54 12155
55 -63
56 0
57 3465
58 0
59 -15015
60 0
61 45045
62 0
63 -109395
64 0
65 46189

List of values

[1, 0, 1, -1, 0, 3, 0, -3, 0, 5, 3, 0, -15, 0, 35, 0, 15, 0, -35, 0, 63, -5, 0, 105, 0, -315, 0, 231, 0, -35, 0, 315, 0, -693, 0, 429, 35, 0, -315, 0, 3465, 0, -3003, 0, 6435, 0, 315, 0, -1155, 0, 9009, 0, -6435, 0, 12155, -63, 0, 3465, 0, -15015, 0, 45045, 0, -109395, 0, 46189]