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A071798 as a simple table

na(n)
10
22
354
41944
599000
66966000
7655678800
880103945600
912372954249600
102362712677920000
11547235129437920000
12151247218046601600000
1349191138900262719360000
1418601307697723249058560000
158093164859945489259936000000
164014620173473616480790016000000

[0,2,54,1944,99000,6966000,655678800,80103945600,
 12372954249600,2362712677920000,
 547235129437920000,151247218046601600000,
 49191138900262719360000,
 18601307697723249058560000,
 8093164859945489259936000000,
 4014620173473616480790016000000]