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A163158 as a simple table

na(n)
12
27
323
4167
5439
63023
77919
854287
9974167
102550407
1132522920134767
123372041405099481407
139839618880490124200692486211717007
14724995932728680612729658820311719934835368079

[2,7,23,167,439,3023,7919,54287,974167,2550407,
 32522920134767,3372041405099481407,
 9839618880490124200692486211717007,
 724995932728680612729658820311719934835368079]