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A092908 as a simple table

na(n)
12
23
35
47
5101
6103
7107
8109
9307
10401
11409
12503
13509
14601
15607
16701
17709
18809
19907
2010007
2110009
2210103
2310301
2410303
2510501
2610601
2710607
2810709
2910903
3010909
3120101
3220107
3320201
3420407
3520507
3620509
3720707
3820807
3920809
4020903

[2,3,5,7,101,103,107,109,307,401,409,503,509,601,
 607,701,709,809,907,10007,10009,10103,10301,10303,
 10501,10601,10607,10709,10903,10909,20101,20107,
 20201,20407,20507,20509,20707,20807,20809,20903]