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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.

A379620 Denominators of the partial sums of the reciprocals of the alternating sum of divisors function (A206369).

Table of values

n a(n)
1 1
2 1
3 2
4 6
5 12
6 12
7 4
8 20
9 140
10 35
11 70
12 105
13 140
14 420
15 840
16 9240
17 18480
18 18480
19 55440
20 55440
21 55440
22 55440
23 55440
24 11088
25 1584
26 1584
27 7920
28 7920
29 55440
30 55440
31 11088
32 1584
33 7920
34 3960
35 990
36 6930
37 13860
38 13860
39 27720
40 27720
41 1386
42 2772
43 2772
44 13860
45 3465
46 6930
47 79695

List of values

[1, 1, 2, 6, 12, 12, 4, 20, 140, 35, 70, 105, 140, 420, 840, 9240, 18480, 18480, 55440, 55440, 55440, 55440, 55440, 11088, 1584, 1584, 7920, 7920, 55440, 55440, 11088, 1584, 7920, 3960, 990, 6930, 13860, 13860, 27720, 27720, 1386, 2772, 2772, 13860, 3465, 6930, 79695]

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

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