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A256641 as a simple table

na(n)
15
210
310
420
540
640
720
820
940
1060
1170
1270
13100
14100
1540
1620
1740
1860
1980
20120

[5,10,10,20,40,40,20,20,40,60,70,70,100,100,40,20,
 40,60,80,120]