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A016883 as a simple table

na(n)
02048
11977326743
2743008370688
334271896307633
4584318301411328
55559060566555523
636028797018963968
7177917621779460413
8717368321110468608
92472159215084012303
107516865509350965248

[2048,1977326743,743008370688,34271896307633,
 584318301411328,5559060566555523,
 36028797018963968,177917621779460413,
 717368321110468608,2472159215084012303,
 7516865509350965248]