A102643 - cp's OEIS frontend

A102643 A006530(x)=2 is a local minimum if x=2^n. Running upward with argument x, the largest prime divisor should increase. The value of first peak is a(n).

n	a(n)
1	3
2	5
3	11
4	17
5	17
6	13
7	43
8	257
9	257
10	41
11	683
12	4099
13	2731
14	2731
15	331
16	65537
17	65537
18	262147
19	174763
20	174763
21	61681
22	199729
23	2796203
24	2796203
25	4051
26	9586981
27	87211
28	15790321
29	15790321
30	1073741827
31	715827883
32	715827883
33	6700417
34	26317
35	86171

[3, 5, 11, 17, 17, 13, 43, 257, 257, 41, 683, 4099, 2731, 2731, 331, 65537, 65537, 262147, 174763, 174763, 61681, 199729, 2796203, 2796203, 4051, 9586981, 87211, 15790321, 15790321, 1073741827, 715827883, 715827883, 6700417, 26317, 86171]

cp's OEIS Frontend

A102643 A006530(x)=2 is a local minimum if x=2^n. Running upward with argument x, the largest prime divisor should increase. The value of first peak is a(n).

Table of values

List of values