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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.

A160956 a(n) = ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 9.

Table of values

n a(n)
1 511
2 130305
3 1676080
4 16679040
5 49902216
6 427400400
7 490968800
8 2134917120
9 3665586960
10 12725065080
11 10953738768
12 54707251200
13 34736533160
14 125197044000
15 163679268480
16 273269391360
17 222788253240
18 934724674800
19 482144484080
20 1628808330240
21 1610377664000

List of values

[511, 130305, 1676080, 16679040, 49902216, 427400400, 490968800, 2134917120, 3665586960, 12725065080, 10953738768, 54707251200, 34736533160, 125197044000, 163679268480, 273269391360, 222788253240, 934724674800, 482144484080, 1628808330240, 1610377664000]

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

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