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.

A064045 Square array read by antidiagonals of number of length 2k walks on an n-dimensional hypercubic lattice starting and finishing at the origin and staying in the nonnegative part.

Table of values

n a(n)
0 1
1 0
2 1
3 0
4 1
5 1
6 0
7 2
8 2
9 1
10 0
11 5
12 10
13 3
14 1
15 0
16 14
17 70
18 24
19 4
20 1
21 0
22 42
23 588
24 285
25 44
26 5
27 1
28 0
29 132
30 5544
31 4242
32 740
33 70
34 6
35 1
36 0
37 429
38 56628
39 73206
40 16016
41 1525
42 102
43 7
44 1
45 0
46 1430
47 613470
48 1403028
49 410928
50 43470
51 2730
52 140
53 8
54 1
55 0
56 4862
57 6952660
58 29082339
59 11925672
60 1491210
61 96684
62 4445
63 184
64 9
65 1

List of values

[1, 0, 1, 0, 1, 1, 0, 2, 2, 1, 0, 5, 10, 3, 1, 0, 14, 70, 24, 4, 1, 0, 42, 588, 285, 44, 5, 1, 0, 132, 5544, 4242, 740, 70, 6, 1, 0, 429, 56628, 73206, 16016, 1525, 102, 7, 1, 0, 1430, 613470, 1403028, 410928, 43470, 2730, 140, 8, 1, 0, 4862, 6952660, 29082339, 11925672, 1491210, 96684, 4445, 184, 9, 1]