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A368438 as a simple table

na(n)
01
15
249
3725
414305
5352805
610441489
7360526325
814226677185
9631571457605
1031152937452529
111690317145051925
12100052040656540065
136415726051515362405
14443047566486308303569
1532780692416679034537525
162587108326603274903810945

[1,5,49,725,14305,352805,10441489,360526325,
 14226677185,631571457605,31152937452529,
 1690317145051925,100052040656540065,
 6415726051515362405,443047566486308303569,
 32780692416679034537525,2587108326603274903810945]