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A317421 as a simple table

na(n)
12
27
335
4223
51711
615283
7155333
81766819
922205615
10305275979
114553222111
1273179347509
131260129395189
1423135381385341
15450963438488267
169298480714769813
17202154606388513675
184620729025472999443
19110759284511324893795
202777748141259276697671
2172735279236489471934853

[2,7,35,223,1711,15283,155333,1766819,22205615,
 305275979,4553222111,73179347509,1260129395189,
 23135381385341,450963438488267,9298480714769813,
 202154606388513675,4620729025472999443,
 110759284511324893795,2777748141259276697671,
 72735279236489471934853]