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A138738 as a simple table

na(n)
01
11
21
37
425
5121
61561
79871
8101137
91293265
1015765841
11226501111
123355388521
1355348183177
14981791212585
1519611613003711
16387083895223201
178241127257050401
18193814428658623777
194572332597344204135
20116627907470591924281
213142752742361513926681

[1,1,1,7,25,121,1561,9871,101137,1293265,15765841,
 226501111,3355388521,55348183177,981791212585,
 19611613003711,387083895223201,8241127257050401,
 193814428658623777,4572332597344204135,
 116627907470591924281,3142752742361513926681]