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A002793 as a simple table

na(n)
00
11
24
320
4124
5920
67940
778040
8859580
910477880
10139931620
112030707640
1231805257340
13534514790680
149591325648580
15182974870484120
163697147584561340
1778861451031150840
181770536585183202980
1941729280102868841080
201030007496863617367420
2126568602827124392999640

[0,1,4,20,124,920,7940,78040,859580,10477880,
 139931620,2030707640,31805257340,534514790680,
 9591325648580,182974870484120,3697147584561340,
 78861451031150840,1770536585183202980,
 41729280102868841080,1030007496863617367420,
 26568602827124392999640]