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A066406 as a simple table

na(n)
10
224
3192
41248
57680
646464
7279552
81678848
910076160
1060463104
11362790912
122176770048
1313060669440
1478364114944
15470184886272
162821109710848
1716926659051520
18101559955881984
19609359738437632
203656158436917248
2121936950634086400
22131621703829684224

[0,24,192,1248,7680,46464,279552,1678848,10076160,
 60463104,362790912,2176770048,13060669440,
 78364114944,470184886272,2821109710848,
 16926659051520,101559955881984,609359738437632,
 3656158436917248,21936950634086400,
 131621703829684224]