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A115387 as a simple table

na(n)
11
22
34
46
512
624
748
860
9120
10240
11360
12720
131440
142880
154320
165040
1710080
1820160
1930240
2060480
21120960
22131040
23262080
24393120
25786240
261572480
271965600
283931200
294324320
308648640
3117297280
3221621600
3343243200
3486486400
35172972800

[1,2,4,6,12,24,48,60,120,240,360,720,1440,2880,
 4320,5040,10080,20160,30240,60480,120960,131040,
 262080,393120,786240,1572480,1965600,3931200,
 4324320,8648640,17297280,21621600,43243200,
 86486400,172972800]