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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.

A145747 a(n) is the smallest number m such that phi(m)+sigma(m)=n*pi(m).

Table of values

n a(n)
3 3
4 2
5 14
6 26
7 55
8 30
9 56
10 329
11 626
12 366
13 340
14 558
15 288
16 552
17 828
18 3496
19 6928
20 2430
21 81809
22 3920
23 3432
24 8680
25 48380
26 23430
27 2520
28 144020
29 435056
30 21384
31 728096
32 188376
33 11802175
34 97320
35 54057938
36 89700
37 349752
38 1143492
39 11286632
40 490752

List of values

[3, 2, 14, 26, 55, 30, 56, 329, 626, 366, 340, 558, 288, 552, 828, 3496, 6928, 2430, 81809, 3920, 3432, 8680, 48380, 23430, 2520, 144020, 435056, 21384, 728096, 188376, 11802175, 97320, 54057938, 89700, 349752, 1143492, 11286632, 490752]

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

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