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A212287 as a simple table

na(n)
15
213
317
419
537
673
7101
8151
9197
10251
11401
12491
13601
14677
15727
16883
171373
181453
191471
201667
212029
222179
232663
243389
253469
263631
273719
284057
294357
304733
315477
326359
336761
347019
358093
368713
378837
389127
399439
409803
419923
4210093
4310141
4410831
4510891
4611617
4711831
4812101
4912343

[5,13,17,19,37,73,101,151,197,251,401,491,601,677,
 727,883,1373,1453,1471,1667,2029,2179,2663,3389,
 3469,3631,3719,4057,4357,4733,5477,6359,6761,7019,
 8093,8713,8837,9127,9439,9803,9923,10093,10141,
 10831,10891,11617,11831,12101,12343]