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A162806 as a simple table

na(n)
01
120
2380
37030
4129960
52400840
644352270
7819332820
815135787980
9279607936230
105165281123560
1195419783331640
121762718203098270
1332563220683609620
14601550117011031580
1511112615265773737430

[1,20,380,7030,129960,2400840,44352270,819332820,
 15135787980,279607936230,5165281123560,
 95419783331640,1762718203098270,32563220683609620,
 601550117011031580,11112615265773737430]