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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.

A145391 Number of inequivalent sublattices of index n in centered rectangular lattice.

Table of values

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

List of values

[1, 2, 3, 5, 4, 7, 5, 10, 8, 10, 7, 17, 8, 13, 14, 19, 10, 21, 11, 24, 18, 19, 13, 35, 17, 22, 22, 31, 16, 38, 17, 36, 26, 28, 26, 50, 20, 31, 30, 50, 22, 50, 23, 45, 42, 37, 25, 69, 30, 48, 38, 52, 28, 62, 38, 65, 42, 46, 31, 90, 32, 49, 55, 69, 44, 74, 35, 66, 50, 74]

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

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