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A086143 as a simple table

na(n)
14
2585
31111
499499
51010101
61001001001
71000100010001
81000010000100001
91000001000001000001
101000000100000010000001
111000000010000000100000001
121000000001000000001000000001
131000000000100000000010000000001

[4,585,1111,99499,1010101,1001001001,
 1000100010001,1000010000100001,
 1000001000001000001,1000000100000010000001,
 1000000010000000100000001,
 1000000001000000001000000001,
 1000000000100000000010000000001]