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A299224 as a simple table

na(n)
12
261
3628
45663
551862
6486305
74532025
842210111
9393354513
103665540260
1134156287528
12318279356683
132965838291898
1427636672383375
15257527745652155
162399729999704478
1722361489149827987
18208371854494502461

[2,61,628,5663,51862,486305,4532025,42210111,
 393354513,3665540260,34156287528,318279356683,
 2965838291898,27636672383375,257527745652155,
 2399729999704478,22361489149827987,
 208371854494502461]