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A109116 as a simple table

na(n)
020
1432
23024
312800
440500
5105840
6241472
7497664
8947700
91694000
102874960
114672512
127320404
1311113200
1416416000
1523674880
1633428052
1746317744
1863102800
1984672000
20112058100
21146452592
22189221184
23241920000
24306312500
25384387120

[20,432,3024,12800,40500,105840,241472,497664,
 947700,1694000,2874960,4672512,7320404,11113200,
 16416000,23674880,33428052,46317744,63102800,
 84672000,112058100,146452592,189221184,241920000,
 306312500,384387120]