%I A087818
%S A087818 1,1,3,2,1,3,2,1,4,3,7,2,5,1,3,9,2,5,4,1,3,7,6,11,2,4,1,7,3,6,5,2,9,4,
               7,
%T A087818 1,3,5,9,2,8,4,7,1,6,3,10,9,5,8,2,4,12,11,1,3,9,5,8,19,2,12,7,4,10,6,1,
%U A087818 9,3,14,5,12,21,2,7,4,10,6,9,1,3,8,5,11,23,2,10,4,15,14,6,13,1,3,8,5,11
%N A087818 Consider numbers x = 4n + 1 which are of the form x = y^2 + z^2 with 
               y <= z; sequence gives smallest value of y.
%e A087818 x=45, y=3, z=6. 45-9 = 36 = 6^2
%o A087818 (PARI) fourkp1(n) = { forstep(x=1,n,4, for(y=1,floor(sqrt(x)), z=x-y^2; 
               if(issquare(z),print1(y" "); break; ) ) ) }
%Y A087818 Cf. A087819.
%Y A087818 Sequence in context: A130784 A119910 A138034 this_sequence A112746 A107460 
               A152975
%Y A087818 Adjacent sequences: A087815 A087816 A087817 this_sequence A087819 A087820 
               A087821
%K A087818 nonn
%O A087818 1,3
%A A087818 Cino Hilliard (hillcino368(AT)gmail.com), Oct 06 2003