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A202013 as a simple table

na(n)
00
11
22
312
4100
51120
615606
7260344
85056136
9112026240
102788230250
1177009739136
122337124786668
1377302709780608
142767629599791070
15106631592312384000
164398877912885363216
17193450993635808976896
189034380526387410161874
19446519425974262943518720
2023284829853408862172112500

[0,1,2,12,100,1120,15606,260344,5056136,112026240,
 2788230250,77009739136,2337124786668,
 77302709780608,2767629599791070,
 106631592312384000,4398877912885363216,
 193450993635808976896,9034380526387410161874,
 446519425974262943518720,
 23284829853408862172112500]