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.

A209693 Triangle of coefficients of polynomials u(n,x) jointly generated with A209694; see the Formula section.

Table of values

n a(n)
1 1
2 0
3 2
4 0
5 3
6 3
7 0
8 4
9 9
10 4
11 0
12 5
13 17
14 19
15 5
16 0
17 6
18 27
19 49
20 34
21 6
22 0
23 7
24 39
25 98
26 115
27 55
28 7
29 0
30 8
31 53
32 170
33 284
34 236
35 83
36 8
37 0
38 9
39 69
40 269
41 585
42 706
43 440
44 119
45 9
46 0
47 10
48 87
49 399
50 1070
51 1706
52 1568
53 763
54 164
55 10
56 0
57 11
58 107
59 564
60 1799
61 3577
62 4395
63 3193
64 1250
65 219

List of values

[1, 0, 2, 0, 3, 3, 0, 4, 9, 4, 0, 5, 17, 19, 5, 0, 6, 27, 49, 34, 6, 0, 7, 39, 98, 115, 55, 7, 0, 8, 53, 170, 284, 236, 83, 8, 0, 9, 69, 269, 585, 706, 440, 119, 9, 0, 10, 87, 399, 1070, 1706, 1568, 763, 164, 10, 0, 11, 107, 564, 1799, 3577, 4395, 3193, 1250, 219]