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A124674 as a simple table

na(n)
12
23
35
47
523
637
753
873
9257
10523
112357
122753
133257
143527
155237
165273
177253
187523

[2,3,5,7,23,37,53,73,257,523,2357,2753,3257,3527,
 5237,5273,7253,7523]