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A251962 as a simple table

na(n)
15484
211375
311375
427550
526027
627550
7101307
8149744
9149744
10101307
11417045
121201953
132124017
141201953
15417045
161957438
1710509427
1830761067
1930761067
2010509427
211957438
2210045910
2394160979
24458358230
25736975310
26458358230

[5484,11375,11375,27550,26027,27550,101307,149744,
 149744,101307,417045,1201953,2124017,1201953,
 417045,1957438,10509427,30761067,30761067,
 10509427,1957438,10045910,94160979,458358230,
 736975310,458358230]