A091789 - OEIS

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A091789 as a simple table

n	a(n)
1	1
2	2
3	21
4	122
5	22112
6	21122221
7	1222211221122
8	221122112222112222112
9	2112222112222112211222211221122221
10	1222211221122221122112222112222112211222211222211221122

[1,2,21,122,22112,21122221,1222211221122, 221122112222112222112, 2112222112222112211222211221122221, 12222112211222211221122221122221122112222112222112\ 21122]