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A359948 as a simple table

na(n)
12
22
33
45
53
613
75
87
941
1013
1183
12109
13347
14337
15127
1667
17379
18499
19739
204243
212311
221973
235827
247333
25971
263449
273967
283407
2912671
301423
31859
3220641
337237
34769
359209
36281
3712919
3816633
3911383
4030449
416733
4240627
4334591
441103
4514303
465479
474603
4817477
495113
5051001
5136299
5257037
531153
5434297
551237

[2,2,3,5,3,13,5,7,41,13,83,109,347,337,127,67,379,
 499,739,4243,2311,1973,5827,7333,971,3449,3967,
 3407,12671,1423,859,20641,7237,769,9209,281,12919,
 16633,11383,30449,6733,40627,34591,1103,14303,
 5479,4603,17477,5113,51001,36299,57037,1153,34297,
 1237]