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.

A328649 Irregular triangular array read by rows: row n shows the coefficients of the following polynomial of degree n: (1/n!)*(numerator of n-th derivative of (x-2)/(1-x-x^2)).

Table of values

n a(n)
0 2
1 -1
2 -1
3 -4
4 1
5 3
6 3
7 6
8 -1
9 -4
10 -12
11 -6
12 -8
13 1
14 7
15 20
16 30
17 10
18 10
19 -1
20 -11
21 -42
22 -60
23 -60
24 -15
25 -12
26 1
27 18
28 77
29 147
30 140
31 105
32 21
33 14
34 -1
35 -29
36 -144
37 -308
38 -392
39 -280
40 -168
41 -28
42 -16
43 1
44 47
45 261
46 648
47 924
48 882
49 504
50 252
51 36
52 18
53 -1
54 -76
55 -470
56 -1305

List of values

[2, -1, -1, -4, 1, 3, 3, 6, -1, -4, -12, -6, -8, 1, 7, 20, 30, 10, 10, -1, -11, -42, -60, -60, -15, -12, 1, 18, 77, 147, 140, 105, 21, 14, -1, -29, -144, -308, -392, -280, -168, -28, -16, 1, 47, 261, 648, 924, 882, 504, 252, 36, 18, -1, -76, -470, -1305]