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A172452 as a simple table

na(n)
01
11
21
32
44
512
648
7192
8768
93840
1023040
11161280
121128960
139031680
1472253440
15578027520
164624220160
1741617981440
18416179814400
194577977958400
2054935735500800
21659228826009600
228569974738124800
23119979646333747200
241679715048672460800
2525195725730086912000
26377935885951303680000

[1,1,1,2,4,12,48,192,768,3840,23040,161280,
 1128960,9031680,72253440,578027520,4624220160,
 41617981440,416179814400,4577977958400,
 54935735500800,659228826009600,8569974738124800,
 119979646333747200,1679715048672460800,
 25195725730086912000,377935885951303680000]