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.

A071389 Least number m such that cardinality of InvPhi(m) = prime(n).

Table of values

n a(n)
1 1
2 2
3 8
4 32
5 48
6 396
7 72
8 216
9 1056
10 1320
11 240
12 480
13 15936
14 3072
15 7344
16 2016
17 3024
18 9984
19 22848
20 3360
21 13248
22 9360
23 4800
24 9504
25 9216
26 23328
27 7680
28 53280
29 12480
30 29376
31 91200
32 159744
33 22464
34 228960
35 29952
36 179200
37 47040
38 68544
39 15840
40 20736
41 61440

List of values

[1, 2, 8, 32, 48, 396, 72, 216, 1056, 1320, 240, 480, 15936, 3072, 7344, 2016, 3024, 9984, 22848, 3360, 13248, 9360, 4800, 9504, 9216, 23328, 7680, 53280, 12480, 29376, 91200, 159744, 22464, 228960, 29952, 179200, 47040, 68544, 15840, 20736, 61440]

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

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