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A162970 as a simple table

na(n)
10
21
33
412
540
6150
7546
82128
98352
1034380
11144100
12626736
132784288
1412753832
1559692920
16286857600
171407536896
187069630608
1936217682352
20189489626560
211010037302400
225488251406176
2330348031302688
24170812160339712

[0,1,3,12,40,150,546,2128,8352,34380,144100,
 626736,2784288,12753832,59692920,286857600,
 1407536896,7069630608,36217682352,189489626560,
 1010037302400,5488251406176,30348031302688,
 170812160339712]