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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.

A305632 Expansion of Product_{r = 1 or not a perfect power} 1/(1 + (-x)^r).

Table of values

n a(n)
0 1
1 1
2 0
3 1
4 2
5 2
6 1
7 2
8 4
9 3
10 2
11 4
12 6
13 5
14 4
15 7
16 10
17 8
18 7
19 11
20 15
21 13
22 12
23 17
24 22
25 19
26 18
27 25
28 30
29 28
30 26
31 35
32 42
33 39
34 38
35 49
36 59
37 56
38 54
39 69
40 81
41 77
42 76
43 94
44 110
45 105
46 105
47 127
48 147
49 141
50 142
51 171
52 195
53 189
54 190
55 227
56 257
57 250
58 254
59 299
60 335
61 328
62 334
63 390
64 432

List of values

[1, 1, 0, 1, 2, 2, 1, 2, 4, 3, 2, 4, 6, 5, 4, 7, 10, 8, 7, 11, 15, 13, 12, 17, 22, 19, 18, 25, 30, 28, 26, 35, 42, 39, 38, 49, 59, 56, 54, 69, 81, 77, 76, 94, 110, 105, 105, 127, 147, 141, 142, 171, 195, 189, 190, 227, 257, 250, 254, 299, 335, 328, 334, 390, 432]

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

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