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A099044 as a simple table

na(n)
01
12
218
3180
41890
520412
6224532
72501928
828146690
9318995820
103636552348
1141655054168
12479033122932
135527305264600
1463958818061800
15741922289516880
168624846615633730
17100454095876204620
181171964451889053900
1913693479385229998200
20160213708807190978940

[1,2,18,180,1890,20412,224532,2501928,28146690,
 318995820,3636552348,41655054168,479033122932,
 5527305264600,63958818061800,741922289516880,
 8624846615633730,100454095876204620,
 1171964451889053900,13693479385229998200,
 160213708807190978940]