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A230459 as a simple table

na(n)
12
27
371
4661
5733
62371
73529
813499
946549
1098101
11163517
12197933
131924217
143322441
155370731

[2,7,71,661,733,2371,3529,13499,46549,98101,
 163517,197933,1924217,3322441,5370731]