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A258539 as a simple table

na(n)
1784
22916
38836
427889
581796
6241081
7682276
81915456
95262436
1014341369
1138613796
12103347556
13274763776
14727812484
151921068900
165060045956
1713303315600
1834935348100
1991655140516
20240318589729
21629813657664

[784,2916,8836,27889,81796,241081,682276,1915456,
 5262436,14341369,38613796,103347556,274763776,
 727812484,1921068900,5060045956,13303315600,
 34935348100,91655140516,240318589729,629813657664]