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A109121 as a simple table

na(n)
0250
134560
2487350
33028480
412251250
538016000
698499310
7223948800
8461143530
9878560000
101572243750
112672386560
124350609250
136827950080
1410383558750
1515364096000
1622193838810
1731385491200
1843551700630

[250,34560,487350,3028480,12251250,38016000,
 98499310,223948800,461143530,878560000,1572243750,
 2672386560,4350609250,6827950080,10383558750,
 15364096000,22193838810,31385491200,43551700630]