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A125630 as a simple table

na(n)
19
281
3729
46561
559049
6531441
74782969
843006401
9385606089
103440214801
1130482931609
12267934415841
132334817386729
1420170171738161
15172797111134649
161468818073594881
1712396189742824969
18103943773544221521
19866556801437680089
207187319207979903521

[9,81,729,6561,59049,531441,4782969,43006401,
 385606089,3440214801,30482931609,267934415841,
 2334817386729,20170171738161,172797111134649,
 1468818073594881,12396189742824969,
 103943773544221521,866556801437680089,
 7187319207979903521]