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A184680 as a simple table

na(n)
176
2544
33360
421968
5140816
6909520
75858896
837779664
9243525712
101569965008
1110120785744
1265244856016
13420606054992
142711476238800
1517479769838928
16112684908266704
17726433311008848
184683017326649296
1930189489673849680

[76,544,3360,21968,140816,909520,5858896,37779664,
 243525712,1569965008,10120785744,65244856016,
 420606054992,2711476238800,17479769838928,
 112684908266704,726433311008848,4683017326649296,
 30189489673849680]