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A257065 as a simple table

na(n)
12
26
318
427
564
681
7141
8200
9293
10343
11512
12578
13776
14954
151208
161331
171728
181875
192291
202652
213147
223375
234096
244356
255070
265678
276494
286859
298000
308405
319497
3210416
3311633
3412167
3513824
3614406
3715956
3817250
3918948
4019683
4121952
4222743
4324831
4426564

[2,6,18,27,64,81,141,200,293,343,512,578,776,954,
 1208,1331,1728,1875,2291,2652,3147,3375,4096,4356,
 5070,5678,6494,6859,8000,8405,9497,10416,11633,
 12167,13824,14406,15956,17250,18948,19683,21952,
 22743,24831,26564]