A218467 - cp's OEIS frontend

A218467 A variant of the Euclid-Mullin sequence A000945: a(1) = 2, a(n+1) is smallest prime factor congruent to 3 (mod 4) of Product_{k=1..n} a(k) + 1.

n	a(n)
1	2
2	3
3	7
4	43
5	139
6	50207
7	23
8	10651
9	563
10	11
11	19
12	363303615453958067659
13	787
14	2803
15	3261639461817858097484047657974700766171
16	448513341328399688966874038187266281752082128599801650127
17	89724193529143

[2, 3, 7, 43, 139, 50207, 23, 10651, 563, 11, 19, 363303615453958067659, 787, 2803, 3261639461817858097484047657974700766171, 448513341328399688966874038187266281752082128599801650127, 89724193529143]

cp's OEIS Frontend

A218467 A variant of the Euclid-Mullin sequence A000945: a(1) = 2, a(n+1) is smallest prime factor congruent to 3 (mod 4) of Product_{k=1..n} a(k) + 1.

Table of values

List of values