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A343209 as a simple table

na(n)
145
2121
31815
424000
5297025
678250050
7361
83509
930976
1027216
11403202
1275
131805
141728
1531500
16508805
17207368
181609152
19227402340
2029821320745
218223103375490
2237158912
2315482880000
245996600870820
251702422879696000
261176
27324900
2829859840
2930950832
302518646460

[45,121,1815,24000,297025,78250050,361,3509,30976,
 27216,403202,75,1805,1728,31500,508805,207368,
 1609152,227402340,29821320745,8223103375490,
 37158912,15482880000,5996600870820,
 1702422879696000,1176,324900,29859840,30950832,
 2518646460]