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A003439 as a simple table

na(n)
01
1720
2202410
320933840
41047649905
530767936616
6602351808741
78575979362560
894459713879600
9842286559093240
106292583664553881
1140447642842118656
12228438173705550566
131152877640765297760
145271278793334883190
1522085628572718605376
1685604721304213863531

[1,720,202410,20933840,1047649905,30767936616,
 602351808741,8575979362560,94459713879600,
 842286559093240,6292583664553881,
 40447642842118656,228438173705550566,
 1152877640765297760,5271278793334883190,
 22085628572718605376,85604721304213863531]