A080373 - cp's OEIS frontend

A080373 a(n) is the smallest number k such that GCD of n values of prime(j)-1 for successive j values starting with k is greater than 2, where prime(j) = j-th prime.

n	a(n)
1	3
2	6
3	24
4	77
5	271
6	271
7	1395
8	1395
9	1395
10	13717
11	34369
12	172146
13	172146
14	804584
15	804584
16	804584
17	12762142
18	16138563
19	16138563
20	56307979
21	56307979
22	56307979
23	56307979
24	56307979
25	1857276773
26	3511121443

[3, 6, 24, 77, 271, 271, 1395, 1395, 1395, 13717, 34369, 172146, 172146, 804584, 804584, 804584, 12762142, 16138563, 16138563, 56307979, 56307979, 56307979, 56307979, 56307979, 1857276773, 3511121443]

cp's OEIS Frontend

A080373 a(n) is the smallest number k such that GCD of n values of prime(j)-1 for successive j values starting with k is greater than 2, where prime(j) = j-th prime.

Table of values

List of values