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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.

A380286 Number of distinct values of the number of regions between the free polyominoes with n cells and their bounding boxes.

Table of values

n a(n)
1 1
2 1
3 2
4 3
5 5
6 5
7 5
8 6
9 7
10 7
11 7
12 8
13 9
14 9
15 9
16 10
17 11
18 11
19 11
20 12
21 13
22 13
23 13
24 14
25 15
26 15
27 15
28 16
29 17
30 17
31 17
32 18
33 19
34 19
35 19
36 20
37 21
38 21
39 21
40 22
41 23
42 23
43 23
44 24
45 25
46 25
47 25
48 26
49 27
50 27
51 27
52 28
53 29
54 29
55 29
56 30
57 31
58 31
59 31
60 32
61 33
62 33
63 33
64 34
65 35
66 35
67 35
68 36
69 37
70 37
71 37

List of values

[1, 1, 2, 3, 5, 5, 5, 6, 7, 7, 7, 8, 9, 9, 9, 10, 11, 11, 11, 12, 13, 13, 13, 14, 15, 15, 15, 16, 17, 17, 17, 18, 19, 19, 19, 20, 21, 21, 21, 22, 23, 23, 23, 24, 25, 25, 25, 26, 27, 27, 27, 28, 29, 29, 29, 30, 31, 31, 31, 32, 33, 33, 33, 34, 35, 35, 35, 36, 37, 37, 37]

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

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