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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.

A320999 Related to the enumeration of pseudo-square convex polyominoes by semiperimeter.

Table of values

n a(n)
6 1
7 0
8 2
9 2
10 3
11 0
12 11
13 0
14 5
15 10
16 12
17 0
18 20
19 0
20 25
21 16
22 9
23 0
24 51
25 12
26 11
27 22
28 39
29 0
30 69
31 0
32 46
33 28
34 15
35 38
36 104
37 0
38 17
39 34
40 105
41 0
42 105
43 0
44 67
45 92
46 21
47 0
48 175
49 30
50 82
51 46
52 81
53 0
54 141
55 66
56 159
57 52
58 27
59 0
60 299
61 0
62 29
63 140
64 144
65 80
66 177
67 0
68 109
69 64
70 213
71 0
72 374
73 0
74 35

List of values

[1, 0, 2, 2, 3, 0, 11, 0, 5, 10, 12, 0, 20, 0, 25, 16, 9, 0, 51, 12, 11, 22, 39, 0, 69, 0, 46, 28, 15, 38, 104, 0, 17, 34, 105, 0, 105, 0, 67, 92, 21, 0, 175, 30, 82, 46, 81, 0, 141, 66, 159, 52, 27, 0, 299, 0, 29, 140, 144, 80, 177, 0, 109, 64, 213, 0, 374, 0, 35]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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