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A124515 as a simple table

na(n)
19549960
226277285
342932385
485864770
599239790
6113183070
7152596290
8172159515
9198479580
10237059175
11287482065
12305192580
13342533490
14382203030
15542591115
16563002110
17597825570
18686106720
19742227135
20786875025
211135145760

[9549960,26277285,42932385,85864770,99239790,
 113183070,152596290,172159515,198479580,237059175,
 287482065,305192580,342533490,382203030,542591115,
 563002110,597825570,686106720,742227135,786875025,
 1135145760]