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A308531 as a simple table

na(n)
11
24
336
448
5180
6720
75040
820160
925200
1045360
1150400
12498960
13665280
143603600
156486480
167207200
178648640
1814414400
1932432400
20110270160
21698377680
222095133040
232205403200
2441902660800
2573329656400
26146659312800
27240940299600
28293318625600
29963761198400

[1,4,36,48,180,720,5040,20160,25200,45360,50400,
 498960,665280,3603600,6486480,7207200,8648640,
 14414400,32432400,110270160,698377680,2095133040,
 2205403200,41902660800,73329656400,146659312800,
 240940299600,293318625600,963761198400]