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A350392 as a simple table

na(n)
13
25
313
431
571
6131
7227
8353
9577
10883
111283
121789
132389
143169
154093
165113
176329
187723
199343
2011243
2113523
2215959
2318731
2421767
2525031
2628631
2732479
2836529
2940841
3045481
3150341
3255487
3361631
3468099
3574831
3681901
3789317
3898123
39107243
40116681
41126601
42137507

[3,5,13,31,71,131,227,353,577,883,1283,1789,2389,
 3169,4093,5113,6329,7723,9343,11243,13523,15959,
 18731,21767,25031,28631,32479,36529,40841,45481,
 50341,55487,61631,68099,74831,81901,89317,98123,
 107243,116681,126601,137507]