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A109904 as a simple table

na(n)
15
27
313
443
5463
653593
7718052371
8128899801874680399
94153789730832965126116749598699801
104313492281993349218329412357362100514520987205269104143837429352069

[5,7,13,43,463,53593,718052371,128899801874680399,
 4153789730832965126116749598699801,
 43134922819933492183294123573621005145209872052691\
 04143837429352069]