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A133267 as a simple table

na(n)
12
21
34
48
524
656
7156
8400
91092
102928
118052
1222080
1361320
14170664
15478288
161344800
173798240
1810760568
1930585828
2087166656
21249055976
22713197848
232046590844
245883926400
2516945772184
2648881973840
27141214767876
28408513980160
291183282368360
303431518388960

[2,1,4,8,24,56,156,400,1092,2928,8052,22080,61320,
 170664,478288,1344800,3798240,10760568,30585828,
 87166656,249055976,713197848,2046590844,
 5883926400,16945772184,48881973840,141214767876,
 408513980160,1183282368360,3431518388960]