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.

A209172 Triangle of coefficients of polynomials u(n,x) jointly generated with A209413; see the Formula section.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 3
6 1
7 1
8 4
9 7
10 1
11 1
12 6
13 11
14 15
15 1
16 1
17 7
18 23
19 26
20 31
21 1
22 1
23 9
24 30
25 72
26 57
27 63
28 1
29 1
30 10
31 48
32 102
33 201
34 120
35 127
36 1
37 1
38 12
39 58
40 198
41 303
42 522
43 247
44 255
45 1
46 1
47 13
48 82
49 256
50 699
51 825
52 1291
53 502
54 511
55 1
56 1
57 15
58 95
59 420
60 955
61 2223
62 2116
63 3084
64 1013
65 1023
66 1

List of values

[1, 1, 1, 1, 3, 1, 1, 4, 7, 1, 1, 6, 11, 15, 1, 1, 7, 23, 26, 31, 1, 1, 9, 30, 72, 57, 63, 1, 1, 10, 48, 102, 201, 120, 127, 1, 1, 12, 58, 198, 303, 522, 247, 255, 1, 1, 13, 82, 256, 699, 825, 1291, 502, 511, 1, 1, 15, 95, 420, 955, 2223, 2116, 3084, 1013, 1023, 1]