A097267 - OEIS

%I #3 Mar 30 2012 17:29:19

%S 1,3,9,19,21,27,39,33,59,51,75,57,63,103,81,0,93,121,111,99,133,123,

%T 181,129,141,153,159,211,147,227,183,171,217,263,271,201,189,219,0,

%U 307,237,243,261,249,301,267,367,485,231,291,303,409,309,419,327,297

%N Least positive integer that is the diagonal of n primitive Pythagorean quadruples, or zero if no such integer exists.

%C First appearance of n in A097266.

%C Conjecture: a(15)=a(38)=0.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/PythagoreanQuadruple.html">Pythagorean Quadruple.</a>

%Y Cf. A096907-A096909, A097263-A097266.

%K nonn

%O 0,2

%A _Ray Chandler_, Aug 19 2004