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A053524 as a simple table

na(n)
00
11
24
328
4160
5976
65824
735008
8209920
91259776
107558144
1145349888
12272097280
131632587776
149795518464
1558773127168
16352638730240
172115832446976
1812694994550784
1976169967566848
20457019804876800
212742118830309376
2216452712979759104

[0,1,4,28,160,976,5824,35008,209920,1259776,
 7558144,45349888,272097280,1632587776,9795518464,
 58773127168,352638730240,2115832446976,
 12694994550784,76169967566848,457019804876800,
 2742118830309376,16452712979759104]