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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.

A136688 Triangle of polynomials F(x,n) = x*F(x,n-1) + 2*F(x,n-2).

Table of values

n a(n)
1 1
2 0
3 1
4 2
5 0
6 1
7 0
8 4
9 0
10 1
11 4
12 0
13 6
14 0
15 1
16 0
17 12
18 0
19 8
20 0
21 1
22 8
23 0
24 24
25 0
26 10
27 0
28 1
29 0
30 32
31 0
32 40
33 0
34 12
35 0
36 1
37 16
38 0
39 80
40 0
41 60
42 0
43 14
44 0
45 1
46 0
47 80
48 0
49 160
50 0
51 84
52 0
53 16
54 0
55 1
56 32
57 0
58 240
59 0
60 280
61 0
62 112
63 0
64 18
65 0
66 1
67 0
68 192
69 0
70 560
71 0
72 448
73 0
74 144
75 0
76 20
77 0
78 1

List of values

[1, 0, 1, 2, 0, 1, 0, 4, 0, 1, 4, 0, 6, 0, 1, 0, 12, 0, 8, 0, 1, 8, 0, 24, 0, 10, 0, 1, 0, 32, 0, 40, 0, 12, 0, 1, 16, 0, 80, 0, 60, 0, 14, 0, 1, 0, 80, 0, 160, 0, 84, 0, 16, 0, 1, 32, 0, 240, 0, 280, 0, 112, 0, 18, 0, 1, 0, 192, 0, 560, 0, 448, 0, 144, 0, 20, 0, 1]

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