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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.

A248795 Numbers k such that Product_{d|k} phi(d) = Product_{d|(k+1)} phi(d) where phi(x) = Euler totient function (A000010).

Table of values

n a(n)
1 1
2 3
3 5
4 15
5 255
6 65535
7 2200694
8 2619705
9 6372794
10 40588485
11 76466985
12 81591194
13 118018094
14 206569605
15 470542485
16 525644385
17 726638834
18 791937614
19 971122514
20 991172805
21 1268457014
22 1384822005
23 1613055045
24 1709460753
25 1861556654
26 1872619665
27 2507927414
28 2659263945

List of values

[1, 3, 5, 15, 255, 65535, 2200694, 2619705, 6372794, 40588485, 76466985, 81591194, 118018094, 206569605, 470542485, 525644385, 726638834, 791937614, 971122514, 991172805, 1268457014, 1384822005, 1613055045, 1709460753, 1861556654, 1872619665, 2507927414, 2659263945]

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

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