OFFSET
1,1
COMMENTS
The corresponding x-values are in A230710.
LINKS
Zak Seidov, 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(4)=24 because 7^2+24^2=625=5^4.
MATHEMATICA
Table[Select[PowersRepresentations[5^n, 2, 2], CoprimeQ[#[[1]], #[[2]]] &][[1, 2]], {n, 33}] (* T. D. Noe, Nov 04 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Oct 28 2013
STATUS
approved