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.

A292975 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. exp(k*x)*(sec(x) + tan(x)).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 2
5 1
6 1
7 3
8 4
9 2
10 1
11 4
12 9
13 9
14 5
15 1
16 5
17 16
18 28
19 24
20 16
21 1
22 6
23 25
24 65
25 93
26 77
27 61
28 1
29 7
30 36
31 126
32 272
33 338
34 294
35 272
36 1
37 8
38 49
39 217
40 645
41 1189
42 1369
43 1309
44 1385
45 1
46 9
47 64
48 344
49 1320
50 3380
51 5506
52 6238
53 6664
54 7936
55 1
56 10
57 81
58 513
59 2429
60 8141
61 18285
62 27365
63 31993
64 38177
65 50521

List of values

[1, 1, 1, 1, 2, 1, 1, 3, 4, 2, 1, 4, 9, 9, 5, 1, 5, 16, 28, 24, 16, 1, 6, 25, 65, 93, 77, 61, 1, 7, 36, 126, 272, 338, 294, 272, 1, 8, 49, 217, 645, 1189, 1369, 1309, 1385, 1, 9, 64, 344, 1320, 3380, 5506, 6238, 6664, 7936, 1, 10, 81, 513, 2429, 8141, 18285, 27365, 31993, 38177, 50521]