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.

A378507 The smallest number k such that the equation phi(phi(x)) = k has exactly n solutions.

Table of values

n a(n)
2 10
3 56
4 6
5 1
6 84
7 312
8 2
9 200
10 464
11 36
12 108
13 4
14 12
15 88
16 816
17 264
18 440
19 360
20 552
21 120
22 224
23 8
24 3696
25 1320
26 928
27 176
28 624
29 1472
30 832
31 5728
32 24
33 4560
34 1080
35 2000
36 16
37 2848
38 72
39 1312
40 1872
41 80
42 1120
43 216
44 880
45 336
46 23360
47 448
48 3808
49 10608
50 648
51 528
52 352
53 9280
54 32

List of values

[10, 56, 6, 1, 84, 312, 2, 200, 464, 36, 108, 4, 12, 88, 816, 264, 440, 360, 552, 120, 224, 8, 3696, 1320, 928, 176, 624, 1472, 832, 5728, 24, 4560, 1080, 2000, 16, 2848, 72, 1312, 1872, 80, 1120, 216, 880, 336, 23360, 448, 3808, 10608, 648, 528, 352, 9280, 32]

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

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