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A189843 as a simple table

na(n)
11
22
35
418
571
6356
72097
814212
9105821
10887576
118093601
1281310936
13876456695
1410257217440
15127631146697
161705775408656

[1,2,5,18,71,356,2097,14212,105821,887576,8093601,
 81310936,876456695,10257217440,127631146697,
 1705775408656]