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A003752 as a simple table

na(n)
14
272
3584
44016
524656
6140624
7761960
83976704
920173280
10100097008
11488003448
122345542720
1311142878992
1452426883056
15244682331976
161134222633280
175227498311360
1823975219772016
19109500177006104
20498322800625728
212260840364623472
2210230065398683632

[4,72,584,4016,24656,140624,761960,3976704,
 20173280,100097008,488003448,2345542720,
 11142878992,52426883056,244682331976,
 1134222633280,5227498311360,23975219772016,
 109500177006104,498322800625728,2260840364623472,
 10230065398683632]