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A281777 as a simple table

na(n)
00
10
20
30
420
5800
614260
7189280
82181060
923241120
10235737620
112308206560
1221979728100
13204477713440
141864504348980
1516707856095840
16147469451067140
171284607771225760
1811063319237792340
1994343562846289120
20797685042851814180
216694943490279586080

[0,0,0,0,20,800,14260,189280,2181060,23241120,
 235737620,2308206560,21979728100,204477713440,
 1864504348980,16707856095840,147469451067140,
 1284607771225760,11063319237792340,
 94343562846289120,797685042851814180,
 6694943490279586080]