A125043 - cp's OEIS frontend

A125043 Primes of the form 18k+1 generated recursively. Initial prime is 19. General term is a(n) = Min {p is prime; p divides (R^9 - 1)/(R^3 - 1); p == 1 (mod 9)}, where Q is the product of previous terms in the sequence and R = 3*Q.

n	a(n)
1	19
2	20593
3	163
4	8321800321246060993879
5	9002496685879
6	9736549840211105800055992105260095004185761
7	1117
8	48871
9	37
10	109
11	2072647
12	811
13	2647
14	22934467
15	73
16	10715232331
17	4861
18	127
19	883
20	699733
21	19918378819555761579853986597710971

[19, 20593, 163, 8321800321246060993879, 9002496685879, 9736549840211105800055992105260095004185761, 1117, 48871, 37, 109, 2072647, 811, 2647, 22934467, 73, 10715232331, 4861, 127, 883, 699733, 19918378819555761579853986597710971]

cp's OEIS Frontend

A125043 Primes of the form 18k+1 generated recursively. Initial prime is 19. General term is a(n) = Min {p is prime; p divides (R^9 - 1)/(R^3 - 1); p == 1 (mod 9)}, where Q is the product of previous terms in the sequence and R = 3*Q.

Table of values

List of values