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 A230744 #10 Oct 29 2013 11:49:49 %S A230744 5,40,236,1519,10475,54280,441284,2187360,17694245,103595049, %T A230744 673741196,4610651760,24155269835,194708863431,956722571075, %U A230744 7826203465920,45467666569916,298790677846089,2029162683616205,10747406201475600,85901867185267604,418375017592176440 %N A230744 Values of y such that x^2 + y^2 = 41^n with x and y coprime and 0 < x < y. %C A230744 The corresponding x-values are in A230743. %e A230744 a(3)=236 because 115^2+236^2=68921=41^3. %Y A230744 Cf. A009985, A230743. %Y A230744 Cf. A188949, A230623, A230645, A230711, A230713. %K A230744 nonn %O A230744 1,1 %A A230744 _Colin Barker_, Oct 29 2013