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A261245 as a simple table

na(n)
11
23
39
4111
5333
6999
712321
836963
91001001
103003003
119009009
12111111111
13333333333
14999999999
1512333333321
1636999999963
171002003002001
183006009006003
19111222333222111
20333666999666333
2112345678987654321

[1,3,9,111,333,999,12321,36963,1001001,3003003,
 9009009,111111111,333333333,999999999,12333333321,
 36999999963,1002003002001,3006009006003,
 111222333222111,333666999666333,12345678987654321]