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A203831 as a simple table

na(n)
15625
2151659
34238721
4119606211
53383285769
695763046491
72710984443345
876749227497395
92172829037910489
1061514609224652235
111741531281545538081
1249304251065416837283
131395845890054082693289
1439517602012270762571323

[5625,151659,4238721,119606211,3383285769,
 95763046491,2710984443345,76749227497395,
 2172829037910489,61514609224652235,
 1741531281545538081,49304251065416837283,
 1395845890054082693289,39517602012270762571323]