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A308205 as a simple table

na(n)
11
21
32
48
538
6234
71679
813802
9127155
101297619
1114516296
12176640311
132322876382
1432831464503
15496399943530
167995690518504
17136701790293581
182472679442088700
1947180405307783443
20947116124382018095
2119954735355719570880
22440286840550877179031

[1,1,2,8,38,234,1679,13802,127155,1297619,
 14516296,176640311,2322876382,32831464503,
 496399943530,7995690518504,136701790293581,
 2472679442088700,47180405307783443,
 947116124382018095,19954735355719570880,
 440286840550877179031]