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Cubefree taxi-cab numbers.
20

%I #16 May 09 2016 09:00:29

%S 1729,20683,40033,149389,195841,327763,443889,684019,704977,1845649,

%T 2048391,2418271,2691451,3242197,3375001,4342914,4931101,5318677,

%U 5772403,5799339,6058747,7620661,8872487,9443761,10702783,10765603,13623913,16387189,16776487,16983854,17045567,18406603

%N Cubefree taxi-cab numbers.

%C Taxi-cab numbers (A001235) that are not divisible by any cube > 1.

%C A080642 belongs to another version that A011541 focuses on.

%C Cubeful taxi-cab numbers are 4104, 13832, 32832, 39312, 46683, 64232, 65728, 110656, 110808, 134379, 165464, 171288, ...

%e 195841 is a term because 195841 is a member of A001235 and 195841 = 37*67*79.

%Y Cf. A001235, A004709, A011541, A080642.

%K nonn

%O 1,1

%A _Altug Alkan_, May 08 2016