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A003645 as a simple table

na(n)
01
14
220
3112
4672
54224
627456
7183040
81244672
98599552
1060196864
11426008576
123042918400
1321909012480
14158840340480
151158600130560
168496400957440
1762605059686400
18463277441679360
193441489566760960
2025654740406763520
21191852841302753280
221438896309770649600

[1,4,20,112,672,4224,27456,183040,1244672,8599552,
 60196864,426008576,3042918400,21909012480,
 158840340480,1158600130560,8496400957440,
 62605059686400,463277441679360,3441489566760960,
 25654740406763520,191852841302753280,
 1438896309770649600]