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A066224 as a simple table

na(n)
01
14
226
3232
42620
535696
6568504
710349536
8211799312
94809701440
10119952692896
113257843882624
1295680443760576
133020676745975552
14101990226254706560
153666624057550245376
16139813029266338603264

[1,4,26,232,2620,35696,568504,10349536,211799312,
 4809701440,119952692896,3257843882624,
 95680443760576,3020676745975552,
 101990226254706560,3666624057550245376,
 139813029266338603264]