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A155337 as a simple table

na(n)
41
54
610
722
840
9161
10562
113058
1215699
1398124
14620233
155239100
1648386446
17558536676
187037622489
19106784846181

[1,4,10,22,40,161,562,3058,15699,98124,620233,
 5239100,48386446,558536676,7037622489,
 106784846181]