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A181680 as a simple table

na(n)
17224839
29339119
310780559
442464519
545652319
653464319
762198639
869899759
994159799
10121136399
11130777919
12158608799
13191010959
14285785639
15288308159
16322461719
17353256119
18402411239
19423803519

[7224839,9339119,10780559,42464519,45652319,
 53464319,62198639,69899759,94159799,121136399,
 130777919,158608799,191010959,285785639,288308159,
 322461719,353256119,402411239,423803519]