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A337047 as a simple table

na(n)
1405
2412
3850
425315
549419
650127
7224315
8293394
9308700
10697136
11801350
12811910
13997425
141118520
151152000
161177250
171550520
181659350
191725332
201739640
211824500
221976895
232141150
242580640
252580831
263530466
273718376
284050405
294459455
304536532
314577732
324832796
335173100
345510287
355601570
365603989
375609439

[405,412,850,25315,49419,50127,224315,293394,
 308700,697136,801350,811910,997425,1118520,
 1152000,1177250,1550520,1659350,1725332,1739640,
 1824500,1976895,2141150,2580640,2580831,3530466,
 3718376,4050405,4459455,4536532,4577732,4832796,
 5173100,5510287,5601570,5603989,5609439]