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A053175 as a simple table

na(n)
01
18
280
3896
410816
5137728
61823744
724862720
8346498048
94911669248
1070560071680
111024576061440
1215008466534400
13221460239482880
143287994183188480
1549074667327062016
16735814252604162048

[1,8,80,896,10816,137728,1823744,24862720,
 346498048,4911669248,70560071680,1024576061440,
 15008466534400,221460239482880,3287994183188480,
 49074667327062016,735814252604162048]