A232993 - OEIS

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A232993 as a simple table

n	a(n)
1	7
2	31
3	431
4	5279
5	732799
6	851569055172258793218602741480913108991
7	290315886781191681464330388772329064268797313023

[7,31,431,5279,732799, 851569055172258793218602741480913108991, 290315886781191681464330388772329064268797313023]