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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.

A260327 Triangle read by rows: T(n,k) (0 <= k <= n) gives numerators of coefficients in Nörlund's polynomials D_{2n}(x).

Table of values

n a(n)
0 1
1 0
2 -1
3 0
4 2
5 5
6 0
7 -16
8 -42
9 -35
10 0
11 144
12 404
13 420
14 175
15 0
16 -768
17 -2288
18 -2684
19 -1540
20 -385
21 0
22 1061376
23 3327584
24 4252248
25 2862860
26 1051050
27 175175
28 0
29 -552960
30 -1810176
31 -2471456
32 -1849848
33 -820820
34 -210210
35 -25025
36 0
37 200005632
38 679395072
39 978649472
40 792548432
41 397517120
42 125925800
43 23823800
44 2127125

List of values

[1, 0, -1, 0, 2, 5, 0, -16, -42, -35, 0, 144, 404, 420, 175, 0, -768, -2288, -2684, -1540, -385, 0, 1061376, 3327584, 4252248, 2862860, 1051050, 175175, 0, -552960, -1810176, -2471456, -1849848, -820820, -210210, -25025, 0, 200005632, 679395072, 978649472, 792548432, 397517120, 125925800, 23823800, 2127125]