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A109120 as a simple table

na(n)
0980
134560
2312120
31548800
45467500
515482880
637565360
781285120
8161036100
9297440000
10518930280
11863516160
121380726620
132133734400
143201660000
154682055680
166693569460
179378789120
1812907266200
1917478720000
2023326421580
2130720757760
2239972975120
2351439104000

[980,34560,312120,1548800,5467500,15482880,
 37565360,81285120,161036100,297440000,518930280,
 863516160,1380726620,2133734400,3201660000,
 4682055680,6693569460,9378789120,12907266200,
 17478720000,23326421580,30720757760,39972975120,
 51439104000]