A248796 - cp's OEIS frontend

A248796 Numbers k such that Product_{d|(k-2)} phi(d) = Product_{d|(k-1)} phi(d) where phi(x) = Euler totient function (A000010).

n	a(n)
1	3
2	5
3	7
4	17
5	257
6	65537
7	2200696
8	2619707
9	6372796
10	40588487
11	76466987
12	81591196
13	118018096
14	206569607
15	470542487
16	525644387
17	726638836
18	791937616
19	971122516
20	991172807
21	1268457016
22	1384822007
23	1613055047
24	1709460755
25	1861556656
26	1872619667
27	2507927416
28	2659263947

[3, 5, 7, 17, 257, 65537, 2200696, 2619707, 6372796, 40588487, 76466987, 81591196, 118018096, 206569607, 470542487, 525644387, 726638836, 791937616, 971122516, 991172807, 1268457016, 1384822007, 1613055047, 1709460755, 1861556656, 1872619667, 2507927416, 2659263947]

cp's OEIS Frontend

A248796 Numbers k such that Product_{d|(k-2)} phi(d) = Product_{d|(k-1)} phi(d) where phi(x) = Euler totient function (A000010).

Table of values

List of values