cp's OEIS Frontend

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.

A210561 Triangle of coefficients of polynomials u(n,x) jointly generated with A210562; see the Formula section.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 3
6 4
7 1
8 3
9 8
10 8
11 1
12 3
13 9
14 20
15 16
16 1
17 3
18 9
19 26
20 48
21 32
22 1
23 3
24 9
25 27
26 72
27 112
28 64
29 1
30 3
31 9
32 27
33 80
34 192
35 256
36 128
37 1
38 3
39 9
40 27
41 81
42 232
43 496
44 576
45 256
46 1
47 3
48 9
49 27
50 81
51 242
52 656
53 1248
54 1280
55 512
56 1
57 3
58 9
59 27
60 81
61 243
62 716
63 1808
64 3072
65 2816
66 1024
67 1
68 3
69 9

List of values

[1, 1, 2, 1, 3, 4, 1, 3, 8, 8, 1, 3, 9, 20, 16, 1, 3, 9, 26, 48, 32, 1, 3, 9, 27, 72, 112, 64, 1, 3, 9, 27, 80, 192, 256, 128, 1, 3, 9, 27, 81, 232, 496, 576, 256, 1, 3, 9, 27, 81, 242, 656, 1248, 1280, 512, 1, 3, 9, 27, 81, 243, 716, 1808, 3072, 2816, 1024, 1, 3, 9]