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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.

A344573 a(n) = Sum_{d|n} phi(d!).

Table of values

n a(n)
1 1
2 2
3 3
4 10
5 33
6 196
7 1153
8 9226
9 82947
10 829474
11 8294401
12 99533004
13 1194393601
14 16721511554
15 250822656035
16 4013162505226
17 64210599936001
18 1155790798931140
19 20804234379264001
20 416084687586109482
21 8737778439290881155
22 192231125664407654402
23 4229084764616785920001

List of values

[1, 2, 3, 10, 33, 196, 1153, 9226, 82947, 829474, 8294401, 99533004, 1194393601, 16721511554, 250822656035, 4013162505226, 64210599936001, 1155790798931140, 20804234379264001, 416084687586109482, 8737778439290881155, 192231125664407654402, 4229084764616785920001]

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

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