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A257205 as a simple table

na(n)
122901
267606
3146246
4387056
5594621
6753005
71140763
81355370
91545878
101893932
112274326
122671736
133131186
143765721
154535616
165400586
176434782
187609215
199000962
2010630903
2112482102
2214595592
2317066214
2419940731
2523221571
2626931763
2731251495

[22901,67606,146246,387056,594621,753005,1140763,
 1355370,1545878,1893932,2274326,2671736,3131186,
 3765721,4535616,5400586,6434782,7609215,9000962,
 10630903,12482102,14595592,17066214,19940731,
 23221571,26931763,31251495]