cp's OEIS Frontend

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.

A115892 Numbers k such that sigma(k)*phi(k) is a palindrome.

Table of values

n a(n)
1 1
2 2
3 3
4 69
5 219
6 221
7 224
8 254
9 1772
10 2181
11 15463
12 50807
13 63551
14 94236
15 161257
16 602962
17 2105689
18 8371756
19 2115856505
20 2539027806
21 5472276593
22 6819131191
23 15442198064
24 16190055003
25 46870943027

List of values

[1, 2, 3, 69, 219, 221, 224, 254, 1772, 2181, 15463, 50807, 63551, 94236, 161257, 602962, 2105689, 8371756, 2115856505, 2539027806, 5472276593, 6819131191, 15442198064, 16190055003, 46870943027]

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

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