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A099181 as a simple table

na(n)
131
241
361
471
583
6311
7331
8401
9421
10431
11461
12491
13521
14541
15571
16601
17631
18641
19661
20691
21701
22733
23743
24751
25761
26773
27811
28821
29823
30853
31863
32881
33883
34911
35941
36953
37971
38983
39991
402311
412411
422521
432621
442711
452801
463001
473011
483041
493121
503221

[31,41,61,71,83,311,331,401,421,431,461,491,521,
 541,571,601,631,641,661,691,701,733,743,751,761,
 773,811,821,823,853,863,881,883,911,941,953,971,
 983,991,2311,2411,2521,2621,2711,2801,3001,3011,
 3041,3121,3221]