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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.

A177351 Triangle t(n,k)= sum_{m=1..floor(n/2-k)} binomial(n-m-k,m+k), -floor(n/2) <= k <= floor(n/2), read by rows.

Table of values

n a(n)
0 0
1 0
2 2
3 1
4 0
5 3
6 2
7 0
8 5
9 5
10 4
11 1
12 0
13 8
14 8
15 7
16 3
17 0
18 13
19 13
20 13
21 12
22 7
23 1
24 0
25 21
26 21
27 21
28 20
29 14
30 4
31 0
32 34
33 34
34 34
35 34
36 33
37 26
38 11
39 1
40 0
41 55
42 55
43 55
44 55
45 54
46 46
47 25
48 5
49 0
50 89
51 89
52 89
53 89
54 89
55 88
56 79
57 51
58 16
59 1
60 0

List of values

[0, 0, 2, 1, 0, 3, 2, 0, 5, 5, 4, 1, 0, 8, 8, 7, 3, 0, 13, 13, 13, 12, 7, 1, 0, 21, 21, 21, 20, 14, 4, 0, 34, 34, 34, 34, 33, 26, 11, 1, 0, 55, 55, 55, 55, 54, 46, 25, 5, 0, 89, 89, 89, 89, 89, 88, 79, 51, 16, 1, 0]