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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.

A238973 The number of arcs from odd to even level vertices in divisor lattice in canonical order.

Table of values

n a(n)
0 0
1 0
2 1
3 2
4 1
5 3
6 6
7 2
8 5
9 6
10 10
11 16
12 2
13 6
14 8
15 14
16 16
17 26
18 40
19 3
20 8
21 11
22 18
23 12
24 23
25 36
26 27
27 42
28 64
29 96
30 3
31 9
32 13
33 22
34 15
35 29
36 46
37 32
38 37
39 58
40 88
41 67
42 102
43 152
44 224
45 4
46 11
47 16
48 26
49 19
50 36
51 56
52 20
53 41
54 48
55 74
56 112
57 52
58 80
59 93
60 140
61 208
62 108
63 162
64 240
65 352
66 512

List of values

[0, 0, 1, 2, 1, 3, 6, 2, 5, 6, 10, 16, 2, 6, 8, 14, 16, 26, 40, 3, 8, 11, 18, 12, 23, 36, 27, 42, 64, 96, 3, 9, 13, 22, 15, 29, 46, 32, 37, 58, 88, 67, 102, 152, 224, 4, 11, 16, 26, 19, 36, 56, 20, 41, 48, 74, 112, 52, 80, 93, 140, 208, 108, 162, 240, 352, 512]

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

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