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A129724 as a simple table

na(n)
01
12
23
37
424
5116
6720
75160
840320
9350784
103628800
1142940800
12479001600
134650877440
1487178291200
152833294464000
1620922789888000
17-2166903606067200
186402373705728000
196808619561103360000
202432902008176640000
21-26982365129174827008000
221124000727777607680000

[1,2,3,7,24,116,720,5160,40320,350784,3628800,
 42940800,479001600,4650877440,87178291200,
 2833294464000,20922789888000,-2166903606067200,
 6402373705728000,6808619561103360000,
 2432902008176640000,-26982365129174827008000,
 1124000727777607680000]