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A058251 as a simple table

na(n)
01
12
26
3120
41680
536960
65765760
71568286720
8536354058240
924672286679040
102861985254768640
112661646286934835200
123545312854197200486400
135814313080883408797696000
1410500649424075436288638976000

[1,2,6,120,1680,36960,5765760,1568286720,
 536354058240,24672286679040,2861985254768640,
 2661646286934835200,3545312854197200486400,
 5814313080883408797696000,
 10500649424075436288638976000]