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A037212 as a simple table

na(n)
01
10
2720
317640
4726570
517236728
6223847280
71928224440
812500672580
965073916440
10284229347328
111080456070680
123650778821970
1311191823745120
1431612753519200
1583017908015624
16204808695842610
17479043914067360
181065816689968080
192271147404056200

[1,0,720,17640,726570,17236728,223847280,
 1928224440,12500672580,65073916440,284229347328,
 1080456070680,3650778821970,11191823745120,
 31612753519200,83017908015624,204808695842610,
 479043914067360,1065816689968080,2271147404056200]