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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.

A260189 a(n) = A033148(n) / 2^floor(n/4).

Table of values

n a(n)
1 1
2 0
3 0
4 1
5 1
6 0
7 0
8 0
9 0
10 0
11 0
12 1
13 1
14 0
15 0
16 4
17 8
18 0
19 0
20 15
21 22
22 0
23 0
24 52
25 51
26 0
27 0
28 257
29 342
30 0
31 0
32 1589
33 2609
34 0
35 0
36 11417
37 16896
38 0
39 0
40 75375
41 99114
42 0
43 0
44 616010
45 876579
46 0
47 0
48 5253278
49 8551800
50 0
51 0
52 49667373
53 79595269
54 0
55 0
56 525731268
57 764804085
58 0
59 0
60 5932910966
61 8905825760
62 0
63 0

List of values

[1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 4, 8, 0, 0, 15, 22, 0, 0, 52, 51, 0, 0, 257, 342, 0, 0, 1589, 2609, 0, 0, 11417, 16896, 0, 0, 75375, 99114, 0, 0, 616010, 876579, 0, 0, 5253278, 8551800, 0, 0, 49667373, 79595269, 0, 0, 525731268, 764804085, 0, 0, 5932910966, 8905825760, 0, 0]

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