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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.

A136526 Coefficients polynomials B(x, n) = ((1 + a + b)*x - c)*B(x, n-1) - a*b*B(x, n-2) with a = 3, b = 2, and c = 0.

Table of values

n a(n)
0 1
1 0
2 1
3 -6
4 0
5 6
6 0
7 -42
8 0
9 36
10 36
11 0
12 -288
13 0
14 216
15 0
16 468
17 0
18 -1944
19 0
20 1296
21 -216
22 0
23 4536
24 0
25 -12960
26 0
27 7776
28 0
29 -4104
30 0
31 38880
32 0
33 -85536
34 0
35 46656
36 1296
37 0
38 -51840
39 0
40 311040
41 0
42 -559872
43 0
44 279936
45 0
46 32400
47 0
48 -544320
49 0
50 2379456
51 0
52 -3639168
53 0
54 1679616

List of values

[1, 0, 1, -6, 0, 6, 0, -42, 0, 36, 36, 0, -288, 0, 216, 0, 468, 0, -1944, 0, 1296, -216, 0, 4536, 0, -12960, 0, 7776, 0, -4104, 0, 38880, 0, -85536, 0, 46656, 1296, 0, -51840, 0, 311040, 0, -559872, 0, 279936, 0, 32400, 0, -544320, 0, 2379456, 0, -3639168, 0, 1679616]