%N Numbers that cannot be the larger leg of an integer right triangle.
%C The possible values of larger leg of integer right triangle are in A009012.
%C A227481(a(n)) = 1. - _Reinhard Zumkeller_, Oct 11 2013
%H Reinhard Zumkeller, <a href="/A074235/b074235.txt">Table of n, a(n) for n = 1..1000</a>
%e 5 is a member because a^2+5^2=c^2 has no solution for a<5, with integer a, c. 13 is a member because a^2+13^2=c^2 has no solution for a<13,with integer a, c.
%o a074235 n = a074235_list !! (n-1)
%o a074235_list = filter ((== 1) . a227481) [1..]
%o -- _Reinhard Zumkeller_, Oct 11 2013
%Y Cf. A009012.
%Y Cf. A009023 (complement).
%A _Zak Seidov_, Sep 18 2002