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A087305 as a simple table

na(n)
213
3107
41002
510002
6100006
71000007
810000013
9100000005
101000000007
1110000000006
12100000000007
131000000000006
1410000000000003
15100000000000002
161000000000000003
1710000000000000002
18100000000000000005
191000000000000000005
2010000000000000000021
21100000000000000000031

[13,107,1002,10002,100006,1000007,10000013,
 100000005,1000000007,10000000006,100000000007,
 1000000000006,10000000000003,100000000000002,
 1000000000000003,10000000000000002,
 100000000000000005,1000000000000000005,
 10000000000000000021,100000000000000000031]