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A159207 as a simple table

na(n)
3540
44128
519028
664440
7278516
8945816
92788452
1010699008
1134672388
12103376592
13390361412
141299118848
154097433060

[540,4128,19028,64440,278516,945816,2788452,
 10699008,34672388,103376592,390361412,1299118848,
 4097433060]