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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.

A058087 Triangle read by rows, giving coefficients of the ménage hit polynomials ordered by descending powers. T(n, k) for 0 <= k <= n.

Table of values

n a(n)
0 1
1 2
2 -1
3 2
4 0
5 0
6 2
7 3
8 0
9 1
10 2
11 8
12 4
13 8
14 2
15 2
16 15
17 20
18 40
19 30
20 13
21 2
22 24
23 60
24 152
25 210
26 192
27 80
28 2
29 35
30 140
31 469
32 994
33 1477
34 1344
35 579
36 2
37 48
38 280
39 1232
40 3660
41 7888
42 11672
43 10800
44 4738
45 2
46 63
47 504
48 2856
49 11268
50 32958
51 70152
52 104256
53 97434
54 43387

List of values

[1, 2, -1, 2, 0, 0, 2, 3, 0, 1, 2, 8, 4, 8, 2, 2, 15, 20, 40, 30, 13, 2, 24, 60, 152, 210, 192, 80, 2, 35, 140, 469, 994, 1477, 1344, 579, 2, 48, 280, 1232, 3660, 7888, 11672, 10800, 4738, 2, 63, 504, 2856, 11268, 32958, 70152, 104256, 97434, 43387]