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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.

A247222 Numbers n such that n = gcd(n^2, sigma(n^2)).

Table of values

n a(n)
1 1
2 39
3 793
4 7137
5 76921
6 863577
7 2076867
8 4317885
9 8329831
10 23402223
11 53695813
12 55871145
13 224905437
14 243762649
15 1449786951
16 2631094837
17 2781581517
18 3606816823
19 6105766123
20 6605555983
21 6838433189
22 8771312043
23 13907907585
24 35225161895
25 42580779709
26 56541691089

List of values

[1, 39, 793, 7137, 76921, 863577, 2076867, 4317885, 8329831, 23402223, 53695813, 55871145, 224905437, 243762649, 1449786951, 2631094837, 2781581517, 3606816823, 6105766123, 6605555983, 6838433189, 8771312043, 13907907585, 35225161895, 42580779709, 56541691089]

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

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