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A068525 as a simple table

na(n)
24
312
460
572
6240
7192
82112
91152
1014592
1126112
1215360
13139968
14138240
15675840
162101248
17737280
184866048
19786432
2022118400
2136175872
22194641920
2363700992
24138412032
25169869312
261321205760
2711123294208
2816357785600
2925669140480

[4,12,60,72,240,192,2112,1152,14592,26112,15360,
 139968,138240,675840,2101248,737280,4866048,
 786432,22118400,36175872,194641920,63700992,
 138412032,169869312,1321205760,11123294208,
 16357785600,25669140480]