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%I #14 Jul 06 2016 17:50:50
%S 1740,7776,19260,20640,21384,21924,22428,25830,31440,55968,93024,
%T 101010,106140,143910,151164,198792,246510,309582,326196,411138,
%U 421596,428256,499464,590112,639288,697158,870552,941094,958716,1060956,1068210,1087776,1100640
%N Numbers n such that there exists an x!=n that makes {n,n,x} an amicable multiset.
%C We call the multiset {n,n,x} amicable iff sigma(n)=sigma(x)=n+n+x.
%C For the x values, see A259303.
%C If the condition x!=n were dropped, the terms from A005820 would also belong here.
%H John Cerkan, <a href="/A259302/b259302.txt">Table of n, a(n) for n = 1..1689</a>
%o (PARI) isOK(n) = x=sigma(n)-2*n; x>0 && x!=n && sigma(x)==n+n+x;
%Y Cf. A005820, A259307, A259303, A259304, A259305, A259306, A125490.
%K nonn
%O 1,1
%A _Jeppe Stig Nielsen_, Jun 23 2015
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