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.

A329078 Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(n,k) is the number of k-step closed paths (from origin to origin) in 2-dimensional lattice, using steps (t_1,t_2) (|t_1| + |t_2| = n).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 0
5 1
6 1
7 4
8 0
9 1
10 1
11 0
12 8
13 0
14 1
15 1
16 36
17 24
18 12
19 0
20 1
21 1
22 0
23 216
24 0
25 16
26 0
27 1
28 1
29 400
30 1200
31 588
32 48
33 20
34 0
35 1
36 1
37 0
38 8840
39 0
40 1200
41 0
42 24
43 0
44 1
45 1
46 4900
47 58800
48 49440
49 10200
50 2100
51 72
52 28
53 0
54 1
55 1
56 0
57 423640
58 0
59 165760
60 0
61 3336
62 0
63 32
64 0
65 1

List of values

[1, 1, 1, 1, 0, 1, 1, 4, 0, 1, 1, 0, 8, 0, 1, 1, 36, 24, 12, 0, 1, 1, 0, 216, 0, 16, 0, 1, 1, 400, 1200, 588, 48, 20, 0, 1, 1, 0, 8840, 0, 1200, 0, 24, 0, 1, 1, 4900, 58800, 49440, 10200, 2100, 72, 28, 0, 1, 1, 0, 423640, 0, 165760, 0, 3336, 0, 32, 0, 1]