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A301270 as a simple table

na(n)
44
520
6144
71372
816384
9236196
104000000
1177948684
121719926784
1342417997492
141157018619904
1534599023437500
161125899906842624
1739618312131623748
181499253470328324096
1960724508119499193196
202621440000000000000000
21120167769980326767578964
225829995856912430117421056
23298461883710362842247633948
2416079954871362414694843285504

[4,20,144,1372,16384,236196,4000000,77948684,
 1719926784,42417997492,1157018619904,
 34599023437500,1125899906842624,39618312131623748,
 1499253470328324096,60724508119499193196,
 2621440000000000000000,120167769980326767578964,
 5829995856912430117421056,
 298461883710362842247633948,
 16079954871362414694843285504]