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A057257 as a simple table

na(n)
11
23
39
419
527
633
757
881
9171
10207
11243
12253
13361
14513
15729
161083
171539
181791
191809
202187
212673
223249
233699
244617
255643
266561
276859
288303
299747
3010449
3111601
3211913
3313851
3419683
3520493
3620577
3729241
3841193
3941553
4043263
4146569
4250301
4359049

[1,3,9,19,27,33,57,81,171,207,243,253,361,513,729,
 1083,1539,1791,1809,2187,2673,3249,3699,4617,5643,
 6561,6859,8303,9747,10449,11601,11913,13851,19683,
 20493,20577,29241,41193,41553,43263,46569,50301,
 59049]