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A138145 as a simple table

na(n)
11
211
3111
41111
511111
6111111
71110111
811100111
9111000111
101110000111
1111100000111
12111000000111
131110000000111
1411100000000111
15111000000000111
161110000000000111
1711100000000000111
18111000000000000111

[1,11,111,1111,11111,111111,1110111,11100111,
 111000111,1110000111,11100000111,111000000111,
 1110000000111,11100000000111,111000000000111,
 1110000000000111,11100000000000111,
 111000000000000111]