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A219243 as a simple table

na(n)
11
21
31
41
531
645
71513
82836
9114327
10255053
1112537954
1231599601
13427
145246800005

[1,1,1,1,31,45,1513,2836,114327,255053,12537954,
 31599601,427,5246800005]