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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.

A209849 Triangle read by rows: coefficients of polynomials in Sum_{k = 0..t} k^n * binomial(t,k).

Table of values

n a(n)
1 1
2 1
3 1
4 0
5 3
6 1
7 -2
8 3
9 6
10 1
11 0
12 -10
13 15
14 10
15 1
16 16
17 -30
18 -15
19 45
20 15
21 1
22 0
23 112
24 -210
25 35
26 105
27 21
28 1
29 -272
30 588
31 28
32 -735
33 280
34 210
35 28
36 1
37 0
38 -2448
39 5292
40 -2436
41 -1575
42 1008
43 378
44 36
45 1
46 7936
47 -18960
48 4140
49 20160
50 -14595
51 -1575
52 2730
53 630
54 45
55 1

List of values

[1, 1, 1, 0, 3, 1, -2, 3, 6, 1, 0, -10, 15, 10, 1, 16, -30, -15, 45, 15, 1, 0, 112, -210, 35, 105, 21, 1, -272, 588, 28, -735, 280, 210, 28, 1, 0, -2448, 5292, -2436, -1575, 1008, 378, 36, 1, 7936, -18960, 4140, 20160, -14595, -1575, 2730, 630, 45, 1]