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A158997 as a simple table

na(n)
12
25
311
4404
5737
6161
7575
8101
91001
1010001
111008001
121008001
13100001
14227218812722
151000001
1610000001
173536651551566353
18100000001
191000000001
2026993605822850639962
2110000000001
22100000000001
23140452633741147336254041
241000000000001

[2,5,11,404,737,161,575,101,1001,10001,1008001,
 1008001,100001,227218812722,1000001,10000001,
 3536651551566353,100000001,1000000001,
 26993605822850639962,10000000001,100000000001,
 140452633741147336254041,1000000000001]