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.

A158854 Triangle T(n,k) read by rows: coefficient [x^k] of the polynomial (1-x)^(1+floor(n/2))* (1+x)^floor((n-1)/2) in row n, column k.

Table of values

n a(n)
0 1
1 1
2 -1
3 1
4 -2
5 1
6 1
7 -1
8 -1
9 1
10 1
11 -2
12 0
13 2
14 -1
15 1
16 -1
17 -2
18 2
19 1
20 -1
21 1
22 -2
23 -1
24 4
25 -1
26 -2
27 1
28 1
29 -1
30 -3
31 3
32 3
33 -3
34 -1
35 1
36 1
37 -2
38 -2
39 6
40 0
41 -6
42 2
43 2
44 -1
45 1
46 -1
47 -4
48 4
49 6
50 -6
51 -4
52 4
53 1
54 -1
55 1
56 -2
57 -3
58 8
59 2
60 -12
61 2
62 8
63 -3
64 -2
65 1

List of values

[1, 1, -1, 1, -2, 1, 1, -1, -1, 1, 1, -2, 0, 2, -1, 1, -1, -2, 2, 1, -1, 1, -2, -1, 4, -1, -2, 1, 1, -1, -3, 3, 3, -3, -1, 1, 1, -2, -2, 6, 0, -6, 2, 2, -1, 1, -1, -4, 4, 6, -6, -4, 4, 1, -1, 1, -2, -3, 8, 2, -12, 2, 8, -3, -2, 1]