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.

A281545 Expansion of Sum_{k>=2} x^prime(k)/(1 + x^prime(k)) * Product_{k>=2} (1 + x^prime(k)).

Table of values

n a(n)
1 0
2 0
3 1
4 0
5 1
6 0
7 1
8 2
9 0
10 2
11 1
12 2
13 1
14 2
15 3
16 4
17 1
18 4
19 4
20 4
21 6
22 4
23 7
24 6
25 6
26 8
27 9
28 8
29 10
30 6
31 13
32 12
33 12
34 14
35 15
36 16
37 16
38 18
39 23
40 22
41 19
42 24
43 24
44 30
45 28
46 30
47 33
48 34
49 34
50 40
51 44
52 46
53 44
54 46
55 58
56 56
57 60
58 64
59 65
60 68
61 70
62 80
63 86
64 88
65 87
66 94
67 101
68 112
69 114
70 116
71 125
72 130
73 132
74 148
75 159
76 162
77 163
78 168
79 190
80 196

List of values

[0, 0, 1, 0, 1, 0, 1, 2, 0, 2, 1, 2, 1, 2, 3, 4, 1, 4, 4, 4, 6, 4, 7, 6, 6, 8, 9, 8, 10, 6, 13, 12, 12, 14, 15, 16, 16, 18, 23, 22, 19, 24, 24, 30, 28, 30, 33, 34, 34, 40, 44, 46, 44, 46, 58, 56, 60, 64, 65, 68, 70, 80, 86, 88, 87, 94, 101, 112, 114, 116, 125, 130, 132, 148, 159, 162, 163, 168, 190, 196]