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A144697 as a simple table

na(n)
31
41
53
61
710
89
91
1025
1167
1227
131
1456
15326
16376
1781
181
19119
201314
213134
221909
23243
241
25246
264775
2720420
2825215
299094
30729
311
32501
3316293
34115105
35248595
36180639
3741479
382187
391
401012
4153388
42590764
432048710
442575404
451193548
46183412
476561

[1,1,3,1,10,9,1,25,67,27,1,56,326,376,81,1,119,
 1314,3134,1909,243,1,246,4775,20420,25215,9094,
 729,1,501,16293,115105,248595,180639,41479,2187,1,
 1012,53388,590764,2048710,2575404,1193548,183412,
 6561]