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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.

A078558 GCD of sigma(p#) and phi(p#) where p# = A002110(n) is the product of the first n primes.

Table of values

n a(n)
1 1
2 2
3 8
4 48
5 96
6 1152
7 9216
8 1658880
9 3317760
10 92897280
11 2786918400
12 100329062400
13 802632499200
14 370816214630400
15 741632429260800
16 2966529717043200
17 29665297170432000
18 355983566045184000

List of values

[1, 2, 8, 48, 96, 1152, 9216, 1658880, 3317760, 92897280, 2786918400, 100329062400, 802632499200, 370816214630400, 741632429260800, 2966529717043200, 29665297170432000, 355983566045184000]

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

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