A188949 Values of y such that x^2 + y^2 = 13^n with x and y coprime and 0 < x < y.
1, 3, 12, 46, 120, 597, 2035, 6554, 28560, 86158, 341525, 1315911, 3455641, 17021162, 58317492, 186118929, 815616479, 2474152797, 9719139348, 37641223154, 99498527400, 485257533003, 1671083125805, 5284814079046, 23290743888720, 71041880304722, 276564805068235
Offset: 0
Keywords
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..200
- Chris Busenhart, Lorenz Halbeisen, Norbert Hungerbühler, Oliver Riesen, On primitive solutions of the Diophantine equation x^2+ y^2= M, Eidgenössische Technische Hochschule (ETH Zürich, Switzerland, 2020).
Programs
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Mathematica
Table[Select[PowersRepresentations[13^n, 2, 2], CoprimeQ @@ # &][[1,2]], {n, 0, 30}]
Extensions
Edited by T. D. Noe, Apr 14 2011
Comments