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A036899 as a simple table

na(n)
12
272
32311920
42562840000
53844062000
610617344640
739923436672
849213207440
972555078960
10215073801360
11476873804160
12719511945840
13972291644352
141567905917760
152012086928880
164707721763712
177251605387280

[2,72,2311920,2562840000,3844062000,10617344640,
 39923436672,49213207440,72555078960,215073801360,
 476873804160,719511945840,972291644352,
 1567905917760,2012086928880,4707721763712,
 7251605387280]