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A049398 as a simple table

na(n)
01
110
2110
31320
417160
5240240
63603600
757657600
8980179200
917643225600
10335221286400
116704425728000
12140792940288000
133097444686336000
1471241227785728000
151709789466857472000
1642744736671436800000
171111363153457356800000
1830006805143348633600000

[1,10,110,1320,17160,240240,3603600,57657600,
 980179200,17643225600,335221286400,6704425728000,
 140792940288000,3097444686336000,
 71241227785728000,1709789466857472000,
 42744736671436800000,1111363153457356800000,
 30006805143348633600000]