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A217993 as a simple table

na(n)
02
12
22
32
474
5112
62162
763738
813220
954808
103656570
116992032
12125440
13103859114
1456414914
1587888966

[2,2,2,2,74,112,2162,63738,13220,54808,3656570,
 6992032,125440,103859114,56414914,87888966]