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A099122 as a simple table

na(n)
01
14
255
31540
473815
55461512
6581106988
784431259000
816104878212995
93910294246315600
101178924607035010836
11432472873725488656424
12189789513537655207705620
1398222259182333060014344720

[1,4,55,1540,73815,5461512,581106988,84431259000,
 16104878212995,3910294246315600,
 1178924607035010836,432472873725488656424,
 189789513537655207705620,
 98222259182333060014344720]