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.

A322267 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. (sec(x) + tan(x))^k.

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 1
5 0
6 1
7 2
8 1
9 0
10 1
11 3
12 4
13 2
14 0
15 1
16 4
17 9
18 10
19 5
20 0
21 1
22 5
23 16
24 30
25 32
26 16
27 0
28 1
29 6
30 25
31 68
32 117
33 122
34 61
35 0
36 1
37 7
38 36
39 130
40 320
41 528
42 544
43 272
44 0
45 1
46 8
47 49
48 222
49 725
50 1684
51 2709
52 2770
53 1385
54 0
55 1
56 9
57 64
58 350
59 1440
60 4400
61 9856
62 15600
63 15872
64 7936
65 0
66 1
67 10
68 81
69 520
70 2597
71 9966
72 29125
73 63668
74 99657
75 101042
76 50521
77 0

List of values

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 3, 4, 2, 0, 1, 4, 9, 10, 5, 0, 1, 5, 16, 30, 32, 16, 0, 1, 6, 25, 68, 117, 122, 61, 0, 1, 7, 36, 130, 320, 528, 544, 272, 0, 1, 8, 49, 222, 725, 1684, 2709, 2770, 1385, 0, 1, 9, 64, 350, 1440, 4400, 9856, 15600, 15872, 7936, 0, 1, 10, 81, 520, 2597, 9966, 29125, 63668, 99657, 101042, 50521, 0]