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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.

A291447 Triangle read by rows, numerators of coefficients (in rising powers) of rational polynomials P(n, x) such that Integral_{x=0..1} P'(n, x) = BernoulliMedian(n).

Table of values

n a(n)
0 0
1 1
2 0
3 0
4 0
5 1
6 0
7 0
8 0
9 1
10 -1
11 4
12 0
13 0
14 0
15 1
16 -3
17 48
18 -12
19 36
20 0
21 0
22 0
23 1
24 -7
25 268
26 -176
27 1968
28 -216
29 64
30 0
31 0
32 0
33 1
34 -15
35 240
36 -1580
37 37140
38 -9900
39 10400
40 -5760
41 14400
42 0
43 0
44 0
45 1
46 -31
47 4924
48 -11680
49 488640
50 -238680
51 496320
52 -639360
53 5486400
54 -216000
55 518400

List of values

[0, 1, 0, 0, 0, 1, 0, 0, 0, 1, -1, 4, 0, 0, 0, 1, -3, 48, -12, 36, 0, 0, 0, 1, -7, 268, -176, 1968, -216, 64, 0, 0, 0, 1, -15, 240, -1580, 37140, -9900, 10400, -5760, 14400, 0, 0, 0, 1, -31, 4924, -11680, 488640, -238680, 496320, -639360, 5486400, -216000, 518400]