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A250258 as a simple table

na(n)
11
20
38
468
588
6688
7888
86888
98888
1068888
1188888
12688888
13888888
146888888
158888888
1668888888
1788888888
18688888888
19888888888
206888888888
218888888888
2268888888888
2388888888888
24688888888888
25888888888888
266888888888888
278888888888888
2868888888888888

[1,0,8,68,88,688,888,6888,8888,68888,88888,688888,
 888888,6888888,8888888,68888888,88888888,
 688888888,888888888,6888888888,8888888888,
 68888888888,88888888888,688888888888,888888888888,
 6888888888888,8888888888888,68888888888888]