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A015487 as a simple table

na(n)
01
13
210
3100
42800
5229600
656022400
740896352000
889481218176000
9587175753670912000
1011557967535258231808000
11682497982956998588262400000
12120903152684866385913507635200000

[1,3,10,100,2800,229600,56022400,40896352000,
 89481218176000,587175753670912000,
 11557967535258231808000,
 682497982956998588262400000,
 120903152684866385913507635200000]