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A093173 as a simple table

na(n)
17
247
3383
410321919
551011754393599
61130138339199322632554990773529330319359999999
773562883979319395645666688474019139929848516028923903999999999
84208832729023498248022825567687608993477547383960134557368319999999999

[7,47,383,10321919,51011754393599,
 1130138339199322632554990773529330319359999999,
 73562883979319395645666688474019139929848516028923\
 903999999999,
 42088327290234982480228255676876089934775473839601\
 34557368319999999999]