A222424 - OEIS

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A222424 as a simple table

n	a(n)
1	3
2	5
3	23
4	29
5	53
6	59
7	509
8	1019
9	2039
10	262133
11	262139
12	536870909
13	73786976294838206459
14	2787593149816327892691964784081045188247543

[3,5,23,29,53,59,509,1019,2039,262133,262139, 536870909,73786976294838206459, 2787593149816327892691964784081045188247543]