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A236394 as a simple table

na(n)
12
23
35
413
57
623
721121
8853
912157
10213952189441
1131
1271427531245215711
1317
14163
1568743
1628031803
1788717035481559
184549
1938197
203835420378661
211573954557128833179852821957

[2,3,5,13,7,23,21121,853,12157,213952189441,31,
 71427531245215711,17,163,68743,28031803,
 88717035481559,4549,38197,3835420378661,
 1573954557128833179852821957]