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.

A209820 Triangle of coefficients of polynomials v(n,x) jointly generated with A209819; see the Formula section.

Table of values

n a(n)
1 1
2 2
3 2
4 2
5 6
6 5
7 2
8 8
9 18
10 12
11 2
12 8
13 30
14 52
15 29
16 2
17 8
18 34
19 104
20 146
21 70
22 2
23 8
24 34
25 136
26 342
27 402
28 169
29 2
30 8
31 34
32 144
33 514
34 1080
35 1090
36 408
37 2
38 8
39 34
40 144
41 594
42 1848
43 3306
44 2920
45 985
46 2
47 8
48 34
49 144
50 610
51 2360
52 6370
53 9872
54 7746
55 2378
56 2
57 8
58 34
59 144
60 610
61 2552

List of values

[1, 2, 2, 2, 6, 5, 2, 8, 18, 12, 2, 8, 30, 52, 29, 2, 8, 34, 104, 146, 70, 2, 8, 34, 136, 342, 402, 169, 2, 8, 34, 144, 514, 1080, 1090, 408, 2, 8, 34, 144, 594, 1848, 3306, 2920, 985, 2, 8, 34, 144, 610, 2360, 6370, 9872, 7746, 2378, 2, 8, 34, 144, 610, 2552]