A005266 - cp's OEIS frontend

A005266 a(1)=3, b(n) = Product_{k=1..n} a(k), a(n+1) is the largest prime factor of (b(n)-1).

n	a(n)
1	3
2	2
3	5
4	29
5	79
6	68729
7	3739
8	6221191
9	157170297801581
10	70724343608203457341903
11	46316297682014731387158877659877
12	78592684042614093322289223662773
13	181891012640244955605725966274974474087
14	547275580337664165337990140111772164867508038795347198579326533639132704344301831464707648235639448747816483406685904347568344407941

[3, 2, 5, 29, 79, 68729, 3739, 6221191, 157170297801581, 70724343608203457341903, 46316297682014731387158877659877, 78592684042614093322289223662773, 181891012640244955605725966274974474087, 547275580337664165337990140111772164867508038795347198579326533639132704344301831464707648235639448747816483406685904347568344407941]

cp's OEIS Frontend

A005266 a(1)=3, b(n) = Product_{k=1..n} a(k), a(n+1) is the largest prime factor of (b(n)-1).

Table of values

List of values