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A259988 as a simple table

na(n)
13
213
3213
4213
550213
6350213
71350213
821350213
9221350213
102221350213
1152221350213
12152221350213
135152221350213
1455152221350213
15155152221350213
164155152221350213
1714155152221350213
18314155152221350213
191314155152221350213
2021314155152221350213

[3,13,213,213,50213,350213,1350213,21350213,
 221350213,2221350213,52221350213,152221350213,
 5152221350213,55152221350213,155152221350213,
 4155152221350213,14155152221350213,
 314155152221350213,1314155152221350213,
 21314155152221350213]