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.

A379582 Denominators of the partial alternating sums of the reciprocals of the powerfree part function (A055231).

Table of values

n a(n)
1 1
2 2
3 6
4 6
5 30
6 15
7 105
8 105
9 105
10 210
11 2310
12 2310
13 30030
14 15015
15 1001
16 1001
17 17017
18 34034
19 646646
20 3233230
21 9699690
22 4849845
23 111546435
24 37182145
25 37182145
26 74364290
27 74364290
28 74364290
29 2156564410
30 3234846615
31 100280245065
32 100280245065
33 100280245065
34 200560490130

List of values

[1, 2, 6, 6, 30, 15, 105, 105, 105, 210, 2310, 2310, 30030, 15015, 1001, 1001, 17017, 34034, 646646, 3233230, 9699690, 4849845, 111546435, 37182145, 37182145, 74364290, 74364290, 74364290, 2156564410, 3234846615, 100280245065, 100280245065, 100280245065, 200560490130]

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

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