This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A230842 #9 Nov 04 2013 13:48:04
%S A230842 6,60,415,3479,27474,194220,1752665,10361041,108089046,665045051,
%T A230842 6449019055,45629658360,371682946434,3000926368429,20605153668425,
%U A230842 190323205453920,1089586196530086,11672337637546091,73603293662217846,692487869011494600,5011061854350480605
%N A230842 Values of y such that x^2 + y^2 = 61^n with x and y coprime and 0 < x < y.
%C A230842 The corresponding x-values are in A230841.
%e A230842 a(3)=415 because 234^2+415^2=226981=61^3.
%t A230842 Table[Select[PowersRepresentations[61^n, 2, 2], CoprimeQ[#[[1]], #[[2]]] &][[1, 2]], {n, 21}] (* _T. D. Noe_, Nov 04 2013 *)
%Y A230842 Cf. A230841.
%Y A230842 Cf. A188949, A230623, A230645, A230711, A230713, A230744, A230760.
%K A230842 nonn
%O A230842 1,1
%A A230842 _Colin Barker_, Oct 31 2013