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A127646 as a simple table

na(n)
13
218
3162
42916
534992
6559872
74478976
8107495424
93439853568
10116955021312
113508650639360
12168415230689280
132526228460339200
142526228460339200
1535367198444748800
1670734396889497600
171202484747121459200

[3,18,162,2916,34992,559872,4478976,107495424,
 3439853568,116955021312,3508650639360,
 168415230689280,2526228460339200,2526228460339200,
 35367198444748800,70734396889497600,
 1202484747121459200]