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A026030 as a simple table

na(n)
11
24
315
456
5209
6780
72912
810880
940698
10152456
11572033
122150040
138095425
1430535260
15115377660
16436698240
171655607390
186286707000
1923908446510
2091057063344
21347281885818
221326262602104
235071418015120
2419415851639296
2574419447792340

[1,4,15,56,209,780,2912,10880,40698,152456,572033,
 2150040,8095425,30535260,115377660,436698240,
 1655607390,6286707000,23908446510,91057063344,
 347281885818,1326262602104,5071418015120,
 19415851639296,74419447792340]