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.

A253026 T(n,k) = Number of n X k nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 1 and every value within 1 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 1
3 1
4 2
5 1
6 2
7 3
8 5
9 5
10 3
11 4
12 9
13 5
14 9
15 4
16 5
17 13
18 21
19 21
20 13
21 5
22 6
23 17
24 37
25 21
26 37
27 17
28 6
29 7
30 21
31 53
32 85
33 85
34 53
35 21
36 7
37 8
38 25
39 69
40 149
41 85
42 149
43 69
44 25
45 8
46 9
47 29
48 85
49 213
50 341
51 341
52 213
53 85
54 29
55 9
56 10
57 33
58 101
59 277
60 597
61 341
62 597
63 277
64 101
65 33
66 10
67 11
68 37
69 117
70 341
71 853
72 1365

List of values

[0, 1, 1, 2, 1, 2, 3, 5, 5, 3, 4, 9, 5, 9, 4, 5, 13, 21, 21, 13, 5, 6, 17, 37, 21, 37, 17, 6, 7, 21, 53, 85, 85, 53, 21, 7, 8, 25, 69, 149, 85, 149, 69, 25, 8, 9, 29, 85, 213, 341, 341, 213, 85, 29, 9, 10, 33, 101, 277, 597, 341, 597, 277, 101, 33, 10, 11, 37, 117, 341, 853, 1365]