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A081398 as a simple table

na(n)
12003639
22179316
32180057
42382974
52689561
62720567
72761873
82933675
93145572
103435381
113925463
124007278
134137111
144212692
154360114
164947971
175172881
185379122
195441134
205458673
215523746
225675816
235748831
245867350
255957435
266010917
276537948
286540171
296561511

[2003639,2179316,2180057,2382974,2689561,2720567,
 2761873,2933675,3145572,3435381,3925463,4007278,
 4137111,4212692,4360114,4947971,5172881,5379122,
 5441134,5458673,5523746,5675816,5748831,5867350,
 5957435,6010917,6537948,6540171,6561511]