This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A057369 #17 May 11 2021 17:22:45 %S A057369 16,18,25,45,50,80,234,250,261,425,1025,1040,1530,1625,1746,2320,4250, %T A057369 7605,7794,9650,10413,11050,11925,14416,23425,24050,27920,71298,75650, %U A057369 78416,81693,129625,151625,200720,221425,257085,264618,338949,340245,416050,488610 %N A057369 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 A057369 Soumyadeep Dhar, <a href="/A057369/b057369.txt">Table of n, a(n) for n = 1..112</a> %e A057369 a(1) = 16 = 8+8 = 4*4; 8*8 = (4+4)^2. %o A057369 (PARI) is(k) = fordiv(k, y, if(issquare(k^2 - 4*(y+k/y)^2), return(1))); 0; \\ _Jinyuan Wang_, May 01 2021 %Y A057369 Cf. A057370, A057371, A057372, A057373, A057442. %K A057369 nonn %O A057369 1,1 %A A057369 _Naohiro Nomoto_, Sep 23 2000 %E A057369 More terms from _Jinyuan Wang_, May 01 2021