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.

A210801 Triangle of coefficients of polynomials u(n,x) jointly generated with A210802; see the Formula section.

Table of values

n a(n)
1 1
2 3
3 1
4 6
5 5
6 2
7 12
8 15
9 10
10 3
11 21
12 39
13 37
14 19
15 5
16 39
17 90
18 111
19 81
20 35
21 8
22 66
23 198
24 300
25 281
26 171
27 64
28 13
29 120
30 414
31 750
32 855
33 659
34 346
35 115
36 21
37 201
38 846
39 1776
40 2391
41 2230
42 1474
43 684
44 205
45 34
46 363
47 1683
48 4044
49 6255
50 6828
51 5441
52 3170
53 1323
54 362
55 55

List of values

[1, 3, 1, 6, 5, 2, 12, 15, 10, 3, 21, 39, 37, 19, 5, 39, 90, 111, 81, 35, 8, 66, 198, 300, 281, 171, 64, 13, 120, 414, 750, 855, 659, 346, 115, 21, 201, 846, 1776, 2391, 2230, 1474, 684, 205, 34, 363, 1683, 4044, 6255, 6828, 5441, 3170, 1323, 362, 55]