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A188661 as a simple table

na(n)
117
241
3113
4353
51217
64481
767073
81054721
94206593
1016801793
11274881052673
1218014399314788353
1372057595648540673
1418446744099479355393
154722366483281962074113
1679228162514266026443404214273

[17,41,113,353,1217,4481,67073,1054721,4206593,
 16801793,274881052673,18014399314788353,
 72057595648540673,18446744099479355393,
 4722366483281962074113,
 79228162514266026443404214273]