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A004347 as a simple table

na(n)
51
630
7595
89880
9148995
102118760
1128989675
12386206920
135047381560
1465033528560
15828931106355
1610477677064400
17131567066917650
181643385429346680
1920439879147794485
20253338471349988640

[1,30,595,9880,148995,2118760,28989675,386206920,
 5047381560,65033528560,828931106355,
 10477677064400,131567066917650,1643385429346680,
 20439879147794485,253338471349988640]