A082132 - cp's OEIS frontend

A082132 a(0) = 5; for n > 0, a(n) is the greatest prime factor of PP(a(n-1))*a(n-1)-2 where PP(n) is an abbreviation for PreviousPrime(n).

n	a(n)
0	5
1	13
2	47
3	673
4	1093
5	4789
6	15887
7	6961
8	7079
9	1853387
10	5636791
11	16319158451
12	46975091221
13	97536826417
14	9513432505744326182381
15	2335222008886384800739
16	7440517660385876970522347503153
17	83914607657246408236765553419
18	1960358081272210906656999086971746456168551

[5, 13, 47, 673, 1093, 4789, 15887, 6961, 7079, 1853387, 5636791, 16319158451, 46975091221, 97536826417, 9513432505744326182381, 2335222008886384800739, 7440517660385876970522347503153, 83914607657246408236765553419, 1960358081272210906656999086971746456168551]

cp's OEIS Frontend

A082132 a(0) = 5; for n > 0, a(n) is the greatest prime factor of PP(a(n-1))*a(n-1)-2 where PP(n) is an abbreviation for PreviousPrime(n).

Table of values

List of values