A266165 - OEIS

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A266165 as a simple table

n	a(n)
1	3
2	5
3	17
4	25
5	257
6	481
7	1441
8	13825
9	65537
10	285121
11	1425601
12	2280961
13	2380801
14	6690817
15	7142401
16	11404801
17	29719873
18	59439745
19	100638721
20	237758977
21	4294967297
22	7778073601
23	8778792961

[3,5,17,25,257,481,1441,13825,65537,285121, 1425601,2280961,2380801,6690817,7142401,11404801, 29719873,59439745,100638721,237758977,4294967297, 7778073601,8778792961]