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A172156 as a simple table

na(n)
17
217
337
4157
5317
61277
72557
820477
9655357
105242877
11671088637
122684354557
135368709117
14343597383677
1523058430092136939517
1623611832414348226068477
1748357032784585166988247037
18830767497365572420564879412675215357

[7,17,37,157,317,1277,2557,20477,655357,5242877,
 671088637,2684354557,5368709117,343597383677,
 23058430092136939517,23611832414348226068477,
 48357032784585166988247037,
 830767497365572420564879412675215357]