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.

A298485 Triangle read by rows; row 0 is 1; the n-th row for n>0 contains the coefficients in the expansion of (2-x)*(1+x)^(n-1).

Table of values

n a(n)
0 1
1 2
2 -1
3 2
4 1
5 -1
6 2
7 3
8 0
9 -1
10 2
11 5
12 3
13 -1
14 -1
15 2
16 7
17 8
18 2
19 -2
20 -1
21 2
22 9
23 15
24 10
25 0
26 -3
27 -1
28 2
29 11
30 24
31 25
32 10
33 -3
34 -4
35 -1
36 2
37 13
38 35
39 49
40 35
41 7
42 -7
43 -5
44 -1
45 2
46 15
47 48
48 84
49 84
50 42
51 0
52 -12
53 -6
54 -1
55 2
56 17
57 63
58 132
59 168
60 126
61 42
62 -12
63 -18
64 -7
65 -1
66 2
67 19
68 80
69 195
70 300
71 294
72 168
73 30
74 -30
75 -25
76 -8
77 -1

List of values

[1, 2, -1, 2, 1, -1, 2, 3, 0, -1, 2, 5, 3, -1, -1, 2, 7, 8, 2, -2, -1, 2, 9, 15, 10, 0, -3, -1, 2, 11, 24, 25, 10, -3, -4, -1, 2, 13, 35, 49, 35, 7, -7, -5, -1, 2, 15, 48, 84, 84, 42, 0, -12, -6, -1, 2, 17, 63, 132, 168, 126, 42, -12, -18, -7, -1, 2, 19, 80, 195, 300, 294, 168, 30, -30, -25, -8, -1]