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A120591 as a simple table

na(n)
01
13
212
376
4600
55304
650232
7498360
85112756
953796820
10577370508
116295961100
1269557631936
13776913430272
148758443555360
1599527014659360
161138832618425272
1713110313153525272
18151738042878341400
191764609260161776600

[1,3,12,76,600,5304,50232,498360,5112756,53796820,
 577370508,6295961100,69557631936,776913430272,
 8758443555360,99527014659360,1138832618425272,
 13110313153525272,151738042878341400,
 1764609260161776600]