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A125409 as a simple table

na(n)
01
121
2231
32121
422547
5244601
62714271
730517333
8346395491
93958011609
1045437784111
11523343937005
126041702589491
1369860441606457
14808706293207743
159368913912846221
16108598284502838979
171259272889680954201

[1,21,231,2121,22547,244601,2714271,30517333,
 346395491,3958011609,45437784111,523343937005,
 6041702589491,69860441606457,808706293207743,
 9368913912846221,108598284502838979,
 1259272889680954201]