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A331613 as a simple table

na(n)
1243
2729
31215
42187
53645
66561
710935
815309
919683
1032805
1145927
1254675
1359049
1498415
15137781
16164025
17177147
18216513
19255879
20273375
21295245
22334611
23373977
24413343
25452709
26492075
27531441
28570807
29610173
30649539
31688905
32728271
33767637
34807003
35820125
36846369
37885735
38925101

[243,729,1215,2187,3645,6561,10935,15309,19683,
 32805,45927,54675,59049,98415,137781,164025,
 177147,216513,255879,273375,295245,334611,373977,
 413343,452709,492075,531441,570807,610173,649539,
 688905,728271,767637,807003,820125,846369,885735,
 925101]