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.

A216391 Number of values of k for which phi(k) is a permutation of decimal digits of k, for k < 2^n.

Table of values

n a(n)
1 1
2 1
3 1
4 1
5 2
6 3
7 3
8 3
9 5
10 5
11 5
12 8
13 19
14 21
15 34
16 55
17 81
18 130
19 221
20 407
21 515
22 850
23 1787
24 2287
25 3968
26 8176
27 12332
28 18560
29 36832
30 71375
31 94015
32 173754

List of values

[1, 1, 1, 1, 2, 3, 3, 3, 5, 5, 5, 8, 19, 21, 34, 55, 81, 130, 221, 407, 515, 850, 1787, 2287, 3968, 8176, 12332, 18560, 36832, 71375, 94015, 173754]