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A177598 as a simple table

na(n)
11
215
3767
493621
522431655
69362799454
76260161965339
86298506200484865
99087853319185940117
1018101094912700638755191

[1,15,767,93621,22431655,9362799454,6260161965339,
 6298506200484865,9087853319185940117,
 18101094912700638755191]