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.

A209699 Triangle of coefficients of polynomials u(n,x) jointly generated with A209700; see the Formula section.

Table of values

n a(n)
1 1
2 0
3 2
4 0
5 2
6 4
7 0
8 3
9 4
10 8
11 0
12 4
13 5
14 12
15 16
16 0
17 5
18 6
19 19
20 28
21 32
22 0
23 6
24 7
25 28
26 45
27 68
28 64
29 0
30 7
31 8
32 39
33 66
34 123
35 156
36 128
37 0
38 8
39 9
40 52
41 91
42 200
43 301
44 356
45 256
46 0
47 9
48 10
49 67
50 120
51 303
52 510
53 747
54 796
55 512
56 0
57 10
58 11
59 84
60 153
61 436
62 795
63 1356
64 1789
65 1764
66 1024
67 0
68 11

List of values

[1, 0, 2, 0, 2, 4, 0, 3, 4, 8, 0, 4, 5, 12, 16, 0, 5, 6, 19, 28, 32, 0, 6, 7, 28, 45, 68, 64, 0, 7, 8, 39, 66, 123, 156, 128, 0, 8, 9, 52, 91, 200, 301, 356, 256, 0, 9, 10, 67, 120, 303, 510, 747, 796, 512, 0, 10, 11, 84, 153, 436, 795, 1356, 1789, 1764, 1024, 0, 11]