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.

A355320 Irregular triangle T(n, k), n >= 0, -2*n <= k <= 2*n, read by rows; T(0, 0) = 1; for n > 0, T(n, k) is the sum of all terms in previous rows at one knight's move away.

Table of values

n a(n)
0 1
1 1
2 0
3 0
4 0
5 1
6 1
7 0
8 0
9 1
10 2
11 1
12 0
13 0
14 1
15 1
16 0
17 0
18 2
19 3
20 2
21 0
22 2
23 3
24 2
25 0
26 0
27 1
28 1
29 0
30 0
31 3
32 4
33 3
34 1
35 6
36 8
37 6
38 1
39 3
40 4
41 3
42 0
43 0
44 1
45 1
46 0
47 0
48 4
49 5
50 4
51 3
52 12
53 16
54 12
55 6
56 12
57 16
58 12
59 3
60 4
61 5
62 4
63 0
64 0
65 1
66 1
67 0
68 0
69 5
70 6
71 5
72 6
73 20
74 27
75 21
76 18
77 33
78 44
79 33
80 18
81 21
82 27
83 20
84 6
85 5
86 6
87 5
88 0
89 0
90 1

List of values

[1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 2, 1, 0, 0, 1, 1, 0, 0, 2, 3, 2, 0, 2, 3, 2, 0, 0, 1, 1, 0, 0, 3, 4, 3, 1, 6, 8, 6, 1, 3, 4, 3, 0, 0, 1, 1, 0, 0, 4, 5, 4, 3, 12, 16, 12, 6, 12, 16, 12, 3, 4, 5, 4, 0, 0, 1, 1, 0, 0, 5, 6, 5, 6, 20, 27, 21, 18, 33, 44, 33, 18, 21, 27, 20, 6, 5, 6, 5, 0, 0, 1]