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.

A253011 T(n,k)=Number of nXk nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 1
8 0
9 0
10 1
11 4
12 1
13 0
14 1
15 4
16 10
17 19
18 1
19 1
20 19
21 10
22 20
23 85
24 54
25 1
26 54
27 85
28 20
29 35
30 231
31 632
32 124
33 124
34 632
35 231
36 35
37 56
38 489
39 2902
40 3423
41 250
42 3423
43 2902
44 489
45 56
46 84
47 891
48 8416
49 33533
50 14795
51 14795
52 33533
53 8416
54 891
55 84
56 120
57 1469
58 18770
59 158877
60 309990

List of values

[0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 4, 1, 0, 1, 4, 10, 19, 1, 1, 19, 10, 20, 85, 54, 1, 54, 85, 20, 35, 231, 632, 124, 124, 632, 231, 35, 56, 489, 2902, 3423, 250, 3423, 2902, 489, 56, 84, 891, 8416, 33533, 14795, 14795, 33533, 8416, 891, 84, 120, 1469, 18770, 158877, 309990]