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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.

A064448 a(n) = gcd(n^n, phi(n^n)).

Table of values

n a(n)
1 1
2 2
3 9
4 128
5 625
6 15552
7 117649
8 8388608
9 129140163
10 2000000000
11 25937424601
12 2972033482752
13 23298085122481
14 1587429546508288
15 29192926025390625
16 9223372036854775808
17 48661191875666868481
18 13115469358432179191808

List of values

[1, 2, 9, 128, 625, 15552, 117649, 8388608, 129140163, 2000000000, 25937424601, 2972033482752, 23298085122481, 1587429546508288, 29192926025390625, 9223372036854775808, 48661191875666868481, 13115469358432179191808]

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

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