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A247789 as a simple table

na(n)
15
213
31201
41741
52521
65101
78581
814281
941761
10139921
11353641
12595141
13697381
141460341
151639861
163723721
173889261
186093541
197956061
2011143921
2114199121
2233874681
2346938361
2451521401
2556063461
2662395621
2767523821
2890706981

[5,13,1201,1741,2521,5101,8581,14281,41761,139921,
 353641,595141,697381,1460341,1639861,3723721,
 3889261,6093541,7956061,11143921,14199121,
 33874681,46938361,51521401,56063461,62395621,
 67523821,90706981]