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 A259303 #15 Jul 06 2016 17:51:02
%S A259303 1560,7380,20448,20664,22752,23352,25248,26964,35328,51360,100200,
%T A259303 104412,108792,135540,156312,192096,232740,252252,278460,310752,
%U A259303 362160,401688,492660,543456,548592,588744,659736,732060,767520,826848,998712,999648,1129440,1129464
%N A259303 Numbers n such that there exists an x!=n that makes {x,x,n} an amicable multiset.
%C A259303 We call the multiset {x,x,n} amicable iff sigma(x)=sigma(n)=x+x+n.
%C A259303 For the x values, see A259302.
%C A259303 If the condition x!=n were dropped, the terms from A005820 would also belong here.
%H A259303 John Cerkan, <a href="/A259303/b259303.txt">Table of n, a(n) for n = 1..1742</a>
%o A259303 (PARI) isOK(n) = x=(sigma(n)-n)/2; x>0 && x!=n && denominator(x)==1 && sigma(x)==x+x+n;
%Y A259303 Cf. A005820, A259307, A259302, A259304, A259305, A259306, A125490.
%K A259303 nonn
%O A259303 1,1
%A A259303 _Jeppe Stig Nielsen_, Jun 23 2015