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A126981 as a simple table

na(n)
01
116
2196
31936
419881
5199809
61999396
719998784
8199996164
91999967841
1019999899241
11199999467369
121999998409369
1319999991458225
14199999982358225
151999999950806881
1619999999932878736
17199999999552824025

[1,16,196,1936,19881,199809,1999396,19998784,
 199996164,1999967841,19999899241,199999467369,
 1999998409369,19999991458225,199999982358225,
 1999999950806881,19999999932878736,
 199999999552824025]