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A077203 as a simple table

na(n)
12
223
3307
47001
510007
6700001
71000003
830000001
9100000007
107000000001
1110000000019
12900000000013
133000000000013
1430000000000011
15100000000000031
161000000000000037
1770000000000000003
18300000000000000011

[2,23,307,7001,10007,700001,1000003,30000001,
 100000007,7000000001,10000000019,900000000013,
 3000000000013,30000000000011,100000000000031,
 1000000000000037,70000000000000003,
 300000000000000011]