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A181809 as a simple table

na(n)
12
24
312
424
548
6120
7240
8360
9720
101680
112520
125040
1310080
1415120
1520160
1650400
1755440
18110880
19166320
20221760
21332640
22554400
23665280
241441440
252162160
262882880
274324320
287207200
298648640
3014414400
3117297280
3221621600
3343243200
3473513440

[2,4,12,24,48,120,240,360,720,1680,2520,5040,
 10080,15120,20160,50400,55440,110880,166320,
 221760,332640,554400,665280,1441440,2162160,
 2882880,4324320,7207200,8648640,14414400,17297280,
 21621600,43243200,73513440]