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A203408 as a simple table

na(n)
11
2540
32887450
41123674201
56004054625647
62336525434757970
712484603034492528512
84858482201068079159687
925960009135002449017962445
1010102543266574986692211140472
1153980256514964477791853933850326
1221006844571867038996088473395797925

[1,540,2887450,1123674201,6004054625647,
 2336525434757970,12484603034492528512,
 4858482201068079159687,25960009135002449017962445,
 10102543266574986692211140472,
 53980256514964477791853933850326,
 21006844571867038996088473395797925]