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A139781 as a simple table

na(n)
17
21031
325999
4406898311
56357828601279
624253192047278040531416551
757824115865893569813730623892812790134879
822587545260114675708488599968932468124811638399
95514537417020184499142724613799550869468811634476741679

[7,1031,25999,406898311,6357828601279,
 24253192047278040531416551,
 57824115865893569813730623892812790134879,
 22587545260114675708488599968932468124811638399,
 55145374170201844991427246137995508694688116344767\
 41679]