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A067198 as a simple table

na(n)
15
27
377
46293
512943
623495
730191
899695
9147407
10240425
11258401
12535601
131103825
141570145
151637867
161972607
172219135
182241281
192970517
203785951
215612321
225917003
236215951
249249241
259281899
2612496429
2714779531
2825739701
2930367321
3033522251
3133852841

[5,7,77,6293,12943,23495,30191,99695,147407,
 240425,258401,535601,1103825,1570145,1637867,
 1972607,2219135,2241281,2970517,3785951,5612321,
 5917003,6215951,9249241,9281899,12496429,14779531,
 25739701,30367321,33522251,33852841]