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A033939 as a simple table

na(n)
11
21
31
46
52
64
7393
8464
916161
1018281
1135253
1224242
1337373
1426162
1539393
1663936
171606061
181609061
191626261
201628261
211629261
221636361
231809081
241835381
251849481
263507053
273518153
283548453
293717173
303718173
313736373
323916193

[1,1,1,6,2,4,393,464,16161,18281,35253,24242,
 37373,26162,39393,63936,1606061,1609061,1626261,
 1628261,1629261,1636361,1809081,1835381,1849481,
 3507053,3518153,3548453,3717173,3718173,3736373,
 3916193]