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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.

A145392 Number of inequivalent sublattices of index n in square lattice, where two sublattices are considered equivalent if one can be rotated by a multiple of Pi/2 to give the other.

Table of values

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

List of values

[1, 2, 2, 4, 4, 6, 4, 8, 7, 10, 6, 14, 8, 12, 12, 16, 10, 20, 10, 22, 16, 18, 12, 30, 17, 22, 20, 28, 16, 36, 16, 32, 24, 28, 24, 46, 20, 30, 28, 46, 22, 48, 22, 42, 40, 36, 24, 62, 29, 48, 36, 50, 28, 60, 36, 60, 40, 46, 30, 84, 32, 48, 52, 64, 44, 72, 34, 64, 48, 72]

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

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