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A051710 as a simple table

na(n)
03
117
21415929
314159265358979323846264338327950291
414159265358979323846264338327950288419716939937510582097497

[3,17,1415929,14159265358979323846264338327950291,
 14159265358979323846264338327950288419716939937510\
 582097497]