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A073878 as a simple table

na(n)
11
21
35
413
51
6690
729
80
99207207756
1067857
11935759904202397862281423
12564640443387152026881790255697618312164921101355730025
13356814640940769181
143694582731098
1518773346867970684437556028438
160

[1,1,5,13,1,690,29,0,9207207756,67857,
 935759904202397862281423,
 56464044338715202688179025569761831216492110135573\
 0025,356814640940769181,3694582731098,
 18773346867970684437556028438,0]