A109347 - cp's OEIS frontend

A109347 Zsigmondy numbers for a = 5, b = 3: Zs(n, 5, 3) is the greatest divisor of 5^n - 3^n (A005058) that is relatively prime to 5^m - 3^m for all positive integers m < n.

n	a(n)
1	2
2	1
3	49
4	17
5	1441
6	19
7	37969
8	353
9	19729
10	421
11	24325489
12	481
13	609554401
14	10039
15	216001
16	198593
17	381405156481
18	12979
19	9536162033329
20	288961
21	18306583
22	6125659
23	5960417405949649
24	346561
25	103408180634401
26	152787181
27	3853528045489
28	179655841
29	93132223146359169121

[2, 1, 49, 17, 1441, 19, 37969, 353, 19729, 421, 24325489, 481, 609554401, 10039, 216001, 198593, 381405156481, 12979, 9536162033329, 288961, 18306583, 6125659, 5960417405949649, 346561, 103408180634401, 152787181, 3853528045489, 179655841, 93132223146359169121]

cp's OEIS Frontend

A109347 Zsigmondy numbers for a = 5, b = 3: Zs(n, 5, 3) is the greatest divisor of 5^n - 3^n (A005058) that is relatively prime to 5^m - 3^m for all positive integers m < n.

Table of values

List of values