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A366809 as a simple table

na(n)
11
26
330
4240
52310
630030
7518940
89943560
9230876448
106551588160
11200561595684
127471933410000
13304250263527210
1413082853940673340
15618109122639794688
1632589631537463089128
171922760350251477679196
18117386696543681561301312
197906535060701218163040640

[1,6,30,240,2310,30030,518940,9943560,230876448,
 6551588160,200561595684,7471933410000,
 304250263527210,13082853940673340,
 618109122639794688,32589631537463089128,
 1922760350251477679196,117386696543681561301312,
 7906535060701218163040640]