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A024397 as a simple table

na(n)
12
26
3146
41164
532108
6432720
714141360
8271332960
910373558240
10259311694080
1111400458720000
12351858201408000
1317517836995904000
14644027147554560000
1535846613866733824000
161530195810548224512000
1794207122098479233536000
184580941398125400354816000

[2,6,146,1164,32108,432720,14141360,271332960,
 10373558240,259311694080,11400458720000,
 351858201408000,17517836995904000,
 644027147554560000,35846613866733824000,
 1530195810548224512000,94207122098479233536000,
 4580941398125400354816000]