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A104067 as a simple table

na(n)
117
229
3269
41048589
5274877906957
618446744073709551629
71208925819614629174706189
87957171782556586274486115970349133441607298412757563479047423630290551952200534008528909

[17,29,269,1048589,274877906957,
 18446744073709551629,1208925819614629174706189,
 79571717825565862744861159703491334416072984127575\
 63479047423630290551952200534008528909]