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A281780 as a simple table

na(n)
00
10
20
30
412
5660
620400
7445620
87977732
9126860580
101873839000
1126381789940
12359484471852
134784481401700
1462538498859200
15805447464281460
1610241415118476372
17128722997969290020
181600670708273985000
1919705915838479512180
20240330009637668935292

[0,0,0,0,12,660,20400,445620,7977732,126860580,
 1873839000,26381789940,359484471852,4784481401700,
 62538498859200,805447464281460,10241415118476372,
 128722997969290020,1600670708273985000,
 19705915838479512180,240330009637668935292]