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A068204 as a simple table

na(n)
10
24
3120
43596
5107760
63229204
796768360
82899821596
986897879520
102604036564004
1178034199040600
122338421934653996
1370074623840579280
142099900293282724404
1562926934174641152840
161885708124945951860796

[0,4,120,3596,107760,3229204,96768360,2899821596,
 86897879520,2604036564004,78034199040600,
 2338421934653996,70074623840579280,
 2099900293282724404,62926934174641152840,
 1885708124945951860796]