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A258400 as a simple table

na(n)
18
29
325
432
5121
6289
7841
81681
92048
103481
115041
1210201
1311449
1418769
1522201
1632041
1736481
1838809
1951529
2057121
2172361
2278961
2396721
24120409
25131072
26175561
27185761
28212521
29271441
30323761
31358801
32380689
33410881
34434281
35654481
36674041
37683929
38734449

[8,9,25,32,121,289,841,1681,2048,3481,5041,10201,
 11449,18769,22201,32041,36481,38809,51529,57121,
 72361,78961,96721,120409,131072,175561,185761,
 212521,271441,323761,358801,380689,410881,434281,
 654481,674041,683929,734449]