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A196813 as a simple table

na(n)
10
20
36
496
5600
61392
72156
810624
922410
1062400
1182280
12210336
13280540
14495488
15955950
161332736
171844976
182924640
193933456
206319200
217954170
2210648000
2314081980
2419826304
2525502500
2631809856
2741037354
2852338272
2963979916
3084001200
3198348740
32123033600

[0,0,6,96,600,1392,2156,10624,22410,62400,82280,
 210336,280540,495488,955950,1332736,1844976,
 2924640,3933456,6319200,7954170,10648000,14081980,
 19826304,25502500,31809856,41037354,52338272,
 63979916,84001200,98348740,123033600]