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A250832 as a simple table

na(n)
1625
29025
39025
4119025
5411451
6119025
71301881
816545428
916545428
101301881
1113249600
12516786049
131966779166
14516786049
1513249600
16123432100
1714616585449
18170110220357
19170110220357
2014616585449
21123432100
221093360356
23366421422539

[625,9025,9025,119025,411451,119025,1301881,
 16545428,16545428,1301881,13249600,516786049,
 1966779166,516786049,13249600,123432100,
 14616585449,170110220357,170110220357,14616585449,
 123432100,1093360356,366421422539]