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A053704 as a simple table

na(n)
14
29
325
449
581
6169
7243
8361
9729
10841
111369
121849
132209
142401
153721
165041
176859
187921
1910609
2011449
2114641
2216129
2317161
2419321
2519683
2628561
2729791
2829929
2936481
3044521
3149729
3250653
3354289
3457121
3566049
3685849
3797969
38113569
39128881

[4,9,25,49,81,169,243,361,729,841,1369,1849,2209,
 2401,3721,5041,6859,7921,10609,11449,14641,16129,
 17161,19321,19683,28561,29791,29929,36481,44521,
 49729,50653,54289,57121,66049,85849,97969,113569,
 128881]