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%I #17 May 11 2021 17:22:45
%S 16,18,25,45,50,80,234,250,261,425,1025,1040,1530,1625,1746,2320,4250,
%T 7605,7794,9650,10413,11050,11925,14416,23425,24050,27920,71298,75650,
%U 78416,81693,129625,151625,200720,221425,257085,264618,338949,340245,416050,488610
%N Numbers k that can be expressed as k = w+x = y*z with w*x = (y+z)^2 where w, x, y, and z are all positive integers.
%H Soumyadeep Dhar, <a href="/A057369/b057369.txt">Table of n, a(n) for n = 1..112</a>
%e a(1) = 16 = 8+8 = 4*4; 8*8 = (4+4)^2.
%o (PARI) is(k) = fordiv(k, y, if(issquare(k^2 - 4*(y+k/y)^2), return(1))); 0; \\ _Jinyuan Wang_, May 01 2021
%Y Cf. A057370, A057371, A057372, A057373, A057442.
%K nonn
%O 1,1
%A _Naohiro Nomoto_, Sep 23 2000
%E More terms from _Jinyuan Wang_, May 01 2021
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