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A128646 as a simple table

na(n)
11
22
34
412
560
610
780
8720
97920
1055440
1155440
1218480
1318480
1418480
15425040
165525520
17160240080
1853413360
19160240080
20160240080
21480720240
22480720240
2319709529840
2419709529840
2539419059680
26197095298400
273350620072800

[1,2,4,12,60,10,80,720,7920,55440,55440,18480,
 18480,18480,425040,5525520,160240080,53413360,
 160240080,160240080,480720240,480720240,
 19709529840,19709529840,39419059680,197095298400,
 3350620072800]