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A078791 as a simple table

na(n)
00
11
221
3740
437310
52460024
6200770416
719551774528
82213488134000
9285711909912000
1041419784380740480
116663725042739448320
121178209566488368028160
13227096910697908706560000

[0,1,21,740,37310,2460024,200770416,19551774528,
 2213488134000,285711909912000,41419784380740480,
 6663725042739448320,1178209566488368028160,
 227096910697908706560000]