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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.

A344210 a(n) = Sum_{d|n} mu(n/d) * d^n / phi(n).

Table of values

n a(n)
1 1
2 3
3 13
4 120
5 781
6 22932
7 137257
8 4177920
9 64566801
10 2497558338
11 28531167061
12 2228476723200
13 25239592216021
14 1851888100411464
15 54736732481116543
16 2305807824841605120
17 51702516367896047761
18 6557709646516945221396
19 109912203092239643840221

List of values

[1, 3, 13, 120, 781, 22932, 137257, 4177920, 64566801, 2497558338, 28531167061, 2228476723200, 25239592216021, 1851888100411464, 54736732481116543, 2305807824841605120, 51702516367896047761, 6557709646516945221396, 109912203092239643840221]

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

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