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A114778 as a simple table

na(n)
01
11
22
36
424
5240
64320
7120960
89676800
91567641600
10438939648000
11386266890240000
12750902834626560000
132733286318040678400000
1433674087438261157888000000
15981936389699695364014080000000

[1,1,2,6,24,240,4320,120960,9676800,1567641600,
 438939648000,386266890240000,750902834626560000,
 2733286318040678400000,33674087438261157888000000,
 981936389699695364014080000000]