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A375227 as a simple table

na(n)
01
13
212
366
4504
55040
660840
7839160
812882240
9217607040
104018896000
1180691811200
121750850640000
1340809559190400
141016150162227200
1526898872647046400
16753882642267955200
1722291971504503500800
18693356807039126630400

[1,3,12,66,504,5040,60840,839160,12882240,
 217607040,4018896000,80691811200,1750850640000,
 40809559190400,1016150162227200,26898872647046400,
 753882642267955200,22291971504503500800,
 693356807039126630400]