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A016757 as a simple table

na(n)
01
1243
23125
316807
459049
5161051
6371293
7759375
81419857
92476099
104084101
116436343
129765625
1314348907
1420511149
1528629151
1639135393
1752521875
1869343957
1990224199
20115856201
21147008443
22184528125
23229345007
24282475249
25345025251
26418195493
27503284375
28601692057

[1,243,3125,16807,59049,161051,371293,759375,
 1419857,2476099,4084101,6436343,9765625,14348907,
 20511149,28629151,39135393,52521875,69343957,
 90224199,115856201,147008443,184528125,229345007,
 282475249,345025251,418195493,503284375,601692057]