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A375773 as a simple table

na(n)
01
10
20
30
40
5120
61800
716800
8126000
9834120
106917400
11129399600
123259080000
1372252300120
141370602233000
1523218349918400
16377834084082000
176709735404918120
18147369456297228600
193899127761438053200
20109421543771265852000
213002806840023201408120

[1,0,0,0,0,120,1800,16800,126000,834120,6917400,
 129399600,3259080000,72252300120,1370602233000,
 23218349918400,377834084082000,6709735404918120,
 147369456297228600,3899127761438053200,
 109421543771265852000,3002806840023201408120]