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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.

A199530 T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements.

Table of values

n a(n)
1 1
2 1
3 2
4 1
5 4
6 6
7 1
8 6
9 18
10 12
11 1
12 8
13 36
14 72
15 32
16 1
17 10
18 60
19 212
20 320
21 80
22 1
23 12
24 90
25 464
26 1324
27 1414
28 200
29 1
30 14
31 126
32 860
33 3734
34 8342
35 6346
36 520
37 1
38 16
39 168
40 1432
41 8470
42 30484
43 53302
44 28766
45 1336
46 1
47 18
48 216
49 2212
50 16682
51 84852
52 252154
53 343710
54 131246
55 3472
56 1
57 20
58 270

List of values

[1, 1, 2, 1, 4, 6, 1, 6, 18, 12, 1, 8, 36, 72, 32, 1, 10, 60, 212, 320, 80, 1, 12, 90, 464, 1324, 1414, 200, 1, 14, 126, 860, 3734, 8342, 6346, 520, 1, 16, 168, 1432, 8470, 30484, 53302, 28766, 1336, 1, 18, 216, 2212, 16682, 84852, 252154, 343710, 131246, 3472, 1, 20, 270]