A351890 - cp's OEIS frontend

A351890 Primes p such that tau(p - 1) - 1 = tau(p - 2) = tau(p - 3), where tau(k) is the number of divisors of k (A000005).

n	a(n)
1	5
2	17
3	65537
4	9632244737
5	20892967937
6	127831991297
7	149255504897
8	159667373057
9	351108391937
10	542497063937
11	1650957730817
12	2270398022657
13	2322380932097
14	2747956028417
15	2888694547457
16	3516735087617
17	6029264167937
18	6122338640897
19	6705696695297
20	11125266727937

[5, 17, 65537, 9632244737, 20892967937, 127831991297, 149255504897, 159667373057, 351108391937, 542497063937, 1650957730817, 2270398022657, 2322380932097, 2747956028417, 2888694547457, 3516735087617, 6029264167937, 6122338640897, 6705696695297, 11125266727937]

cp's OEIS Frontend

A351890 Primes p such that tau(p - 1) - 1 = tau(p - 2) = tau(p - 3), where tau(k) is the number of divisors of k (A000005).

Table of values

List of values