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A287798 as a simple table

na(n)
3159
46
55
610
720
840
980
10160
11320
12640
131280
142560
155120
1610240
1720480
1840960
1981920
20163840
21327680
22655360
231310720
242621440
255242880
2610485760
2720971520
2841943040
2983886080
30167772160
31335544320
32671088640
331342177280
342684354560
355368709120
3610737418240

[159,6,5,10,20,40,80,160,320,640,1280,2560,5120,
 10240,20480,40960,81920,163840,327680,655360,
 1310720,2621440,5242880,10485760,20971520,
 41943040,83886080,167772160,335544320,671088640,
 1342177280,2684354560,5368709120,10737418240]