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A240586 as a simple table

na(n)
11
24
322
4140
5950
66692
748284
8354216
92630310
1019713188
11148817524
121130011896
138621650492
1466043991080
15507628779896
163913088587472
1730240258982662
18234210742764964
191817484391184900
2014128074297880536

[1,4,22,140,950,6692,48284,354216,2630310,
 19713188,148817524,1130011896,8621650492,
 66043991080,507628779896,3913088587472,
 30240258982662,234210742764964,1817484391184900,
 14128074297880536]