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.

A117436 Triangle related to exp(x)*sec(2*x).

Table of values

n a(n)
0 1
1 0
2 1
3 4
4 0
5 1
6 0
7 12
8 0
9 1
10 80
11 0
12 24
13 0
14 1
15 0
16 400
17 0
18 40
19 0
20 1
21 3904
22 0
23 1200
24 0
25 60
26 0
27 1
28 0
29 27328
30 0
31 2800
32 0
33 84
34 0
35 1
36 354560
37 0
38 109312
39 0
40 5600
41 0
42 112
43 0
44 1
45 0
46 3191040
47 0
48 327936
49 0
50 10080
51 0
52 144
53 0
54 1
55 51733504
56 0
57 15955200
58 0
59 819840
60 0
61 16800
62 0
63 180
64 0
65 1

List of values

[1, 0, 1, 4, 0, 1, 0, 12, 0, 1, 80, 0, 24, 0, 1, 0, 400, 0, 40, 0, 1, 3904, 0, 1200, 0, 60, 0, 1, 0, 27328, 0, 2800, 0, 84, 0, 1, 354560, 0, 109312, 0, 5600, 0, 112, 0, 1, 0, 3191040, 0, 327936, 0, 10080, 0, 144, 0, 1, 51733504, 0, 15955200, 0, 819840, 0, 16800, 0, 180, 0, 1]