login
Values of d such that the equation x^2 - d*y^2 = 3*d has integer solutions.
1

%I #8 Oct 09 2013 11:28:16

%S 3,7,12,13,19,21,27,28,31,39,43,48,52,57,61,63,67,73,75,76,84,91,93,

%T 97,103,108,109,111,112,117,124,127,129,133,139,147,151,156,157,163,

%U 171,172,175

%N Values of d such that the equation x^2 - d*y^2 = 3*d has integer solutions.

%e 43 appears in the sequence because the equation x^2 - 43*y^2 = 129 has integer solutions, such as (x,y) = (86,13).

%Y Cf. A172000, A230108.

%K nonn

%O 1,1

%A _Colin Barker_, Oct 09 2013