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A228596 as a simple table

na(n)
01
11
22
34
448
5944
632288
72089312
8268215040
968708556288
1035183367427072
1136028619925285888
1273786915826515503104
13302231414653310649337856
142475880026112961032035266560
1540564819073011099018919903485952
161329227995107917459000217502447435776

[1,1,2,4,48,944,32288,2089312,268215040,
 68708556288,35183367427072,36028619925285888,
 73786915826515503104,302231414653310649337856,
 2475880026112961032035266560,
 40564819073011099018919903485952,
 1329227995107917459000217502447435776]