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A171510 as a simple table

na(n)
12
21
312
4121
51222
612341
7124632
81258661
912711242
10128371081
111296422052
1213092591601
13132222338062
141335315972221
1513485382060272
16136189136574941
171375376747809682
1813889956614671761
19140274942894527292
201416639385559944681
2114306668798493974102

[2,1,12,121,1222,12341,124632,1258661,12711242,
 128371081,1296422052,13092591601,132222338062,
 1335315972221,13485382060272,136189136574941,
 1375376747809682,13889956614671761,
 140274942894527292,1416639385559944681,
 14306668798493974102]