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.

A253004 T(n,k) = Number of n X k nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value within 3 of its king move distance from the upper left 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 14
18 1
19 1
20 14
21 10
22 20
23 55
24 34
25 1
26 34
27 55
28 20
29 35
30 140
31 279
32 69
33 69
34 279
35 140
36 35
37 56
38 285
39 1028
40 1132
41 69
42 1132
43 1028
44 285
45 56
46 84
47 506
48 2601
49 7235
50 3072
51 3072
52 7235
53 2601
54 506
55 84
56 120
57 819
58 5318
59 25233
60 39758
61 3072

List of values

[0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 4, 1, 0, 1, 4, 10, 14, 1, 1, 14, 10, 20, 55, 34, 1, 34, 55, 20, 35, 140, 279, 69, 69, 279, 140, 35, 56, 285, 1028, 1132, 69, 1132, 1028, 285, 56, 84, 506, 2601, 7235, 3072, 3072, 7235, 2601, 506, 84, 120, 819, 5318, 25233, 39758, 3072]