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A125729 as a simple table

na(n)
10
25
340
4285
52000
614005
798040
8686285
94804000
1033628005
11235396040
121647772285
1311534406000
1480740842005
15565185894040
163956301258285
1727694108808000
18193858761656005
191357011331592040
209499079321144285

[0,5,40,285,2000,14005,98040,686285,4804000,
 33628005,235396040,1647772285,11534406000,
 80740842005,565185894040,3956301258285,
 27694108808000,193858761656005,1357011331592040,
 9499079321144285]