OFFSET
1,1
COMMENTS
The corresponding x-values are in A230622.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..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).
EXAMPLE
a(2)=15 because 8^2 + 15^2 = 289 = 17^2.
MATHEMATICA
Table[Select[PowersRepresentations[17^n, 2, 2], CoprimeQ@@#&][[1, 2]], {n, 1, 40}] (* Vincenzo Librandi, Mar 02 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Oct 26 2013
STATUS
approved