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A226420 as a simple table

na(n)
12
247
3275
41415
54932
617203
744256
8118669
9275619
10628149
111305850
122677789
135057899
149510519
1517126490
1630158971
1751409213
1886308875

[2,47,275,1415,4932,17203,44256,118669,275619,
 628149,1305850,2677789,5057899,9510519,17126490,
 30158971,51409213,86308875]