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A122417 as a simple table

na(n)
12
26
324
4120
5720
624
740320
8120
95040
10720
11479001600
12120
1387178291200
1440320
15720
165040
176402373705728000
185040
192432902008176640000
20720
2140320
22479001600
23620448401733239439360000
24120
2539916800
2687178291200
273628800
2840320

[2,6,24,120,720,24,40320,120,5040,720,479001600,
 120,87178291200,40320,720,5040,6402373705728000,
 5040,2432902008176640000,720,40320,479001600,
 620448401733239439360000,120,39916800,87178291200,
 3628800,40320]