A060425 - OEIS

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A060425 as a simple table

n	a(n)
1	3
2	31
3	191
4	5119
5	524287
6	3758096383
7	1618481116086271
8	5359447279004780799548150067050349330431
9	2817103802133904744169307240538184064530443801964688726052818649087

[3,31,191,5119,524287,3758096383,1618481116086271, 5359447279004780799548150067050349330431, 28171038021339047441693072405381840645304438019646\ 88726052818649087]