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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.

A209166 Triangle of coefficients of polynomials u(n,x) jointly generated with A209167; see the Formula section.

Table of values

n a(n)
1 1
2 2
3 1
4 4
5 5
6 2
7 7
8 13
9 10
10 3
11 12
12 30
13 34
14 20
15 5
16 20
17 63
18 94
19 80
20 38
21 8
22 33
23 126
24 233
25 258
26 177
27 71
28 13
29 54
30 243
31 536
32 728
33 647
34 374
35 130
36 21
37 88
38 457
39 1171
40 1881
41 2043
42 1527
43 765
44 235
45 34
46 143
47 843
48 2461
49 4559
50 5835
51 5319
52 3443
53 1525
54 420
55 55
56 232

List of values

[1, 2, 1, 4, 5, 2, 7, 13, 10, 3, 12, 30, 34, 20, 5, 20, 63, 94, 80, 38, 8, 33, 126, 233, 258, 177, 71, 13, 54, 243, 536, 728, 647, 374, 130, 21, 88, 457, 1171, 1881, 2043, 1527, 765, 235, 34, 143, 843, 2461, 4559, 5835, 5319, 3443, 1525, 420, 55, 232]