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A001689 as a simple table

na(n)
044
1309
22428
321234
4205056
52170680
625022880
7312273360
84196666880
960451816320
10929459059200
1115196285843200
12263309095526400
134820517384883200
1492987329455820800
151885246675183872000
1640080616912207872000
17891690242177839104000

[44,309,2428,21234,205056,2170680,25022880,
 312273360,4196666880,60451816320,929459059200,
 15196285843200,263309095526400,4820517384883200,
 92987329455820800,1885246675183872000,
 40080616912207872000,891690242177839104000]