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A052648 as a simple table

na(n)
00
15
210
330
4120
5600
63600
725200
8201600
91814400
1018144000
11199584000
122395008000
1331135104000
14435891456000
156538371840000
16104613949440000
171778437140480000
1832011868528640000
19608225502044160000

[0,5,10,30,120,600,3600,25200,201600,1814400,
 18144000,199584000,2395008000,31135104000,
 435891456000,6538371840000,104613949440000,
 1778437140480000,32011868528640000,
 608225502044160000]