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.

A346540 Number A(n,k) of walks on square lattice from (n,k) to (0,0) using steps that decrease the Euclidean distance to the origin and increase the Euclidean distance to (n,k) and that change each coordinate by at most 1; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 3
5 3
6 7
7 5
8 5
9 7
10 19
11 24
12 13
13 24
14 19
15 51
16 81
17 25
18 25
19 81
20 51
21 141
22 298
23 173
24 63
25 173
26 298
27 141
28 393
29 1070
30 739
31 129
32 129
33 739
34 1070
35 393
36 1107
37 3868
38 3423
39 1210
40 321
41 1210
42 3423
43 3868
44 1107
45 3139
46 13960
47 15363
48 6273
49 681
50 681
51 6273
52 15363
53 13960
54 3139

List of values

[1, 1, 1, 3, 3, 3, 7, 5, 5, 7, 19, 24, 13, 24, 19, 51, 81, 25, 25, 81, 51, 141, 298, 173, 63, 173, 298, 141, 393, 1070, 739, 129, 129, 739, 1070, 393, 1107, 3868, 3423, 1210, 321, 1210, 3423, 3868, 1107, 3139, 13960, 15363, 6273, 681, 681, 6273, 15363, 13960, 3139]