A064080 - cp's OEIS frontend

A064080 Zsigmondy numbers for a = 4, b = 1: Zs(n, 4, 1) is the greatest divisor of 4^n - 1^n (A024036) that is relatively prime to 4^m - 1^m for all positive integers m < n.

n	a(n)
1	3
2	5
3	7
4	17
5	341
6	13
7	5461
8	257
9	1387
10	41
11	1398101
12	241
13	22369621
14	3277
15	49981
16	65537
17	5726623061
18	4033
19	91625968981
20	61681
21	1826203
22	838861
23	23456248059221
24	65281
25	1100586419201
26	13421773
27	22906579627
28	15790321
29	96076792050570581

[3, 5, 7, 17, 341, 13, 5461, 257, 1387, 41, 1398101, 241, 22369621, 3277, 49981, 65537, 5726623061, 4033, 91625968981, 61681, 1826203, 838861, 23456248059221, 65281, 1100586419201, 13421773, 22906579627, 15790321, 96076792050570581]

cp's OEIS Frontend

A064080 Zsigmondy numbers for a = 4, b = 1: Zs(n, 4, 1) is the greatest divisor of 4^n - 1^n (A024036) that is relatively prime to 4^m - 1^m for all positive integers m < n.

Table of values

List of values