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Positive integers which are not the semiperimeter of any triangle with integer sides and area.
1

%I #15 May 25 2019 02:04:00

%S 1,2,3,4,5,7,10,11,13,14,17,19,23,26,29,31,37,41,43,46,47,51,53,58,59,

%T 61,62,67,69,71,73,74,79,83,89,92,94,97,101,103,106,107,109,113,122,

%U 123,127,131,137,139,141,142,149,151,157,158,163,167,173,179,181

%N Positive integers which are not the semiperimeter of any triangle with integer sides and area.

%H Peter Kagey, <a href="/A305705/b305705.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = A305703(n)/2.

%Y Complement of A305704.

%Y Cf. A051518, A305703.

%K nonn

%O 1,2

%A _Peter Kagey_, Jun 08 2018