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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.

A023670 Convolution of A023533 with itself.

Table of values

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

List of values

[1, 0, 0, 2, 0, 0, 1, 0, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 1, 2, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 2, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 0, 0, 2]

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