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A191367 a(n) is the smallest sum of 2 distinct positive cubes such that n*a(n) is also sum of 2 distinct positive cubes.

%I A191367 #9 Feb 07 2016 10:46:50
%S A191367 9,728,2457,189,189,126,91,9,1001,28,91,126,133,9,2331,91,91,189,91,
%T A191367 854,9,133,133,2457,217,28,9,126,217,468,133,189,3528,11772,637,28,
%U A191367 133,28,9,189,637,468,217,559,152,637,559,126,72,637,5256,9,793,28,793
%N A191367 a(n) is the smallest sum of 2 distinct positive cubes such that n*a(n) is also sum of 2 distinct positive cubes.
%C A191367 a(n) and n*a(n) are terms of A024670 (Numbers that are sums of 2 distinct positive cubes); a(n)=9 if n is in A191352.
%H A191367 Chai Wah Wu, <a href="/A191367/b191367.txt">Table of n, a(n) for n = 1..1000</a>
%F A191367 a(n)=b^3+c^3, n*a(n)=d^3+e^3.
%e A191367 {n,a(n),b,c,n*a(n),d,e}={1,9,1,2,9,1,2},{2,728,6,8,1456,5,11},{3,2457,9,12,7371,8,19},...
%Y A191367 Cf. A024670, A191352.
%K A191367 nonn
%O A191367 1,1
%A A191367 _Zak Seidov_, Jun 01 2011