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A259266 as a simple table

na(n)
13
27
357
4443
52057
614557
745807
8110443
91672943
106139557
1125670807
12123327057
13123327057
145006139557
1519407922943
16102662389557
17407838170807
183459595983307
193459595983307
2079753541295807
21110981321985443
22110981321985443
239647724486047943
249647724486047943

[3,7,57,443,2057,14557,45807,110443,1672943,
 6139557,25670807,123327057,123327057,5006139557,
 19407922943,102662389557,407838170807,
 3459595983307,3459595983307,79753541295807,
 110981321985443,110981321985443,9647724486047943,
 9647724486047943]