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A143495 as a simple table

na(n)
31
43
51
69
77
81
927
1037
1112
121
1381
14175
1597
1618
171
18243
19781
20660
21205
2225
231
24729
253367
264081
271890
28380
2933
301
312187
3214197
3323772
3415421
354550
36644
3742
381
396561
4058975
41133057
42116298
4347271
449702
451022
4652
471
4819683
49242461
50724260
51830845
52447195

[1,3,1,9,7,1,27,37,12,1,81,175,97,18,1,243,781,
 660,205,25,1,729,3367,4081,1890,380,33,1,2187,
 14197,23772,15421,4550,644,42,1,6561,58975,133057,
 116298,47271,9702,1022,52,1,19683,242461,724260,
 830845,447195]