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A020454 as a simple table

na(n)
111
261
3661
46661
511161
616111
716661
866161
9111611
10161611
11611111
12616111
131111661
141611161
151616161
161616611
171661111
181661161
191666111
206111661
216116111
226116161
236161161
246611611
256661111
266661661
2711111161
2811166611
2911616611

[11,61,661,6661,11161,16111,16661,66161,111611,
 161611,611111,616111,1111661,1611161,1616161,
 1616611,1661111,1661161,1666111,6111661,6116111,
 6116161,6161161,6611611,6661111,6661661,11111161,
 11166611,11616611]