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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.

A103300 Number of perfect rulers with length n.

Table of values

n a(n)
0 1
1 1
2 1
3 2
4 3
5 4
6 2
7 12
8 8
9 4
10 38
11 30
12 14
13 6
14 130
15 80
16 32
17 12
18 500
19 326
20 150
21 66
22 18
23 4
24 944
25 460
26 166
27 56
28 12
29 6
30 2036
31 890
32 304
33 120
34 20
35 10
36 2
37 2678
38 974
39 362
40 100
41 36
42 4
43 2
44 4892
45 2114
46 684
47 238
48 68
49 22
50 4
51 16318
52 6350
53 2286
54 836
55 330
56 108
57 24
58 12
59 31980
60 12252

List of values

[1, 1, 1, 2, 3, 4, 2, 12, 8, 4, 38, 30, 14, 6, 130, 80, 32, 12, 500, 326, 150, 66, 18, 4, 944, 460, 166, 56, 12, 6, 2036, 890, 304, 120, 20, 10, 2, 2678, 974, 362, 100, 36, 4, 2, 4892, 2114, 684, 238, 68, 22, 4, 16318, 6350, 2286, 836, 330, 108, 24, 12, 31980, 12252]

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

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