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A227462 as a simple table

na(n)
11
22
312
4144
52400
650760
71310400
839984000
91407490560
1056143130400
112502730137600
12123302540148480
136653043673436160
14390182090889951360
1524713127865269043200
161681180295452142284800
17122252619549518954496000
189463442426016057083404800
19776944497581062575154790400

[1,2,12,144,2400,50760,1310400,39984000,
 1407490560,56143130400,2502730137600,
 123302540148480,6653043673436160,
 390182090889951360,24713127865269043200,
 1681180295452142284800,122252619549518954496000,
 9463442426016057083404800,
 776944497581062575154790400]