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A309488 as a simple table

na(n)
1101
2103
3107
4109
5307
6401
7409
8503
9509
10601
11607
12701
13709
14809
15907
1610103
1710301
1810303
1910501
2010601
2110607
2210709
2310903
2410909
2520101
2620107
2720201
2820407
2920507
3020509
3120707
3220807
3320809
3420903
3530103
3630109
3730203
3830307
3930403
4030509
4130703
4230707
4330803
4430809

[101,103,107,109,307,401,409,503,509,601,607,701,
 709,809,907,10103,10301,10303,10501,10601,10607,
 10709,10903,10909,20101,20107,20201,20407,20507,
 20509,20707,20807,20809,20903,30103,30109,30203,
 30307,30403,30509,30703,30707,30803,30809]