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.

A055487 Least m such that phi(m) = n!.

Table of values

n a(n)
1 1
2 3
3 7
4 35
5 143
6 779
7 5183
8 40723
9 364087
10 3632617
11 39916801
12 479045521
13 6227180929
14 87178882081
15 1307676655073
16 20922799053799
17 355687465815361
18 6402373865831809
19 121645101106397521
20 2432902011297772771
21 51090942186005065121
22 1124000727844660550281
23 25852016739206547966721
24 620448401734814833377121
25 15511210043338862873694721
26 403291461126645799820077057
27 10888869450418352160768000001
28 304888344611714964835479763201

List of values

[1, 3, 7, 35, 143, 779, 5183, 40723, 364087, 3632617, 39916801, 479045521, 6227180929, 87178882081, 1307676655073, 20922799053799, 355687465815361, 6402373865831809, 121645101106397521, 2432902011297772771, 51090942186005065121, 1124000727844660550281, 25852016739206547966721, 620448401734814833377121, 15511210043338862873694721, 403291461126645799820077057, 10888869450418352160768000001, 304888344611714964835479763201]

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

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