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A264838 as a simple table

na(n)
11
22
32
415
568
6401
72179
823229
9213332
102642772
1138611992
12723385584
1316909827584
14343510569552
159601049357952
16305917702264416

[1,2,2,15,68,401,2179,23229,213332,2642772,
 38611992,723385584,16909827584,343510569552,
 9601049357952,305917702264416]