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A197800 as a simple table

na(n)
12
216
3102
4596
53713
622742
7139212
8853186
95231300
1032071177
11196597389
121205159672
137387795113
1445288409942
15277625447176
161701887549750
1710432835696321
1863954921521562
19392053737458675
202403351095713061

[2,16,102,596,3713,22742,139212,853186,5231300,
 32071177,196597389,1205159672,7387795113,
 45288409942,277625447176,1701887549750,
 10432835696321,63954921521562,392053737458675,
 2403351095713061]