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A083099 as a simple table

na(n)
00
11
22
310
432
5124
6440
71624
85888
921520
1078368
11285856
121041920
133798976
1413849472
1550492800
16184082432
17671121664
182446737920
198920205824
2032520839168
21118562913280
22432250861568
231575879202816
245745263575040

[0,1,2,10,32,124,440,1624,5888,21520,78368,285856,
 1041920,3798976,13849472,50492800,184082432,
 671121664,2446737920,8920205824,32520839168,
 118562913280,432250861568,1575879202816,
 5745263575040]