cp's OEIS Frontend

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.

A238959 The number of arcs from even to odd level vertices in divisor lattice in graded colexicographic order.

Table of values

n a(n)
0 0
1 1
2 1
3 2
4 2
5 4
6 6
7 2
8 5
9 6
10 10
11 16
12 3
13 7
14 9
15 14
16 17
17 26
18 40
19 3
20 8
21 11
22 12
23 18
24 23
25 27
26 36
27 42
28 64
29 96
30 4
31 10
32 14
33 16
34 22
35 30
36 32
37 38
38 46
39 58
40 68
41 88
42 102
43 152
44 224
45 4
46 11
47 16
48 19
49 20
50 26
51 36
52 41
53 48
54 52
55 56
56 74
57 80
58 93
59 108
60 112
61 140
62 162
63 208
64 240
65 352
66 512

List of values

[0, 1, 1, 2, 2, 4, 6, 2, 5, 6, 10, 16, 3, 7, 9, 14, 17, 26, 40, 3, 8, 11, 12, 18, 23, 27, 36, 42, 64, 96, 4, 10, 14, 16, 22, 30, 32, 38, 46, 58, 68, 88, 102, 152, 224, 4, 11, 16, 19, 20, 26, 36, 41, 48, 52, 56, 74, 80, 93, 108, 112, 140, 162, 208, 240, 352, 512]

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

Content is available under The OEIS End-User License Agreement.