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.

A166349 Coefficients of numerator of recursively defined rational function: p(x,3)=x*(x^2 + 6*x + 1)/(1 - x)^4; p(x, n) = 2*x*D[p(x, n - 1), x] - p(x,n-2).

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 6
6 1
7 1
8 31
9 31
10 1
11 1
12 128
13 382
14 128
15 1
16 1
17 493
18 3346
19 3346
20 493
21 1
22 1
23 1858
24 24879
25 54044
26 24879
27 1858
28 1
29 1
30 6955
31 169209
32 683995
33 683995
34 169209
35 6955
36 1
37 1
38 25980
39 1091460
40 7496324
41 13738230
42 7496324
43 1091460
44 25980
45 1
46 1
47 96985
48 6809140

List of values

[1, 1, 1, 1, 6, 1, 1, 31, 31, 1, 1, 128, 382, 128, 1, 1, 493, 3346, 3346, 493, 1, 1, 1858, 24879, 54044, 24879, 1858, 1, 1, 6955, 169209, 683995, 683995, 169209, 6955, 1, 1, 25980, 1091460, 7496324, 13738230, 7496324, 1091460, 25980, 1, 1, 96985, 6809140]