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.

A368025 Array read by ascending antidiagonals: A(n,k) is the determinant of the n-th order Hankel matrix of Catalan numbers M(n) whose generic element is given by M(i,j) = A000108(i+j+k) with i,j = 0, ..., n-1.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 2
9 1
10 1
11 1
12 3
13 5
14 1
15 1
16 1
17 4
18 14
19 14
20 1
21 1
22 1
23 5
24 30
25 84
26 42
27 1
28 1
29 1
30 6
31 55
32 330
33 594
34 132
35 1
36 1
37 1
38 7
39 91
40 1001
41 4719
42 4719
43 429
44 1
45 1
46 1
47 8
48 140
49 2548
50 26026
51 81796
52 40898
53 1430
54 1
55 1
56 1
57 9
58 204
59 5712
60 111384
61 884884
62 1643356
63 379236
64 4862
65 1

List of values

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 5, 1, 1, 1, 4, 14, 14, 1, 1, 1, 5, 30, 84, 42, 1, 1, 1, 6, 55, 330, 594, 132, 1, 1, 1, 7, 91, 1001, 4719, 4719, 429, 1, 1, 1, 8, 140, 2548, 26026, 81796, 40898, 1430, 1, 1, 1, 9, 204, 5712, 111384, 884884, 1643356, 379236, 4862, 1]