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A272885
Cubefree taxi-cab numbers.
20
1729, 20683, 40033, 149389, 195841, 327763, 443889, 684019, 704977, 1845649, 2048391, 2418271, 2691451, 3242197, 3375001, 4342914, 4931101, 5318677, 5772403, 5799339, 6058747, 7620661, 8872487, 9443761, 10702783, 10765603, 13623913, 16387189, 16776487, 16983854, 17045567, 18406603
OFFSET
1,1
COMMENTS
Taxi-cab numbers (A001235) that are not divisible by any cube > 1.
A080642 belongs to another version that A011541 focuses on.
Cubeful taxi-cab numbers are 4104, 13832, 32832, 39312, 46683, 64232, 65728, 110656, 110808, 134379, 165464, 171288, ...
EXAMPLE
195841 is a term because 195841 is a member of A001235 and 195841 = 37*67*79.
CROSSREFS
KEYWORD
nonn
AUTHOR
Altug Alkan, May 08 2016
STATUS
approved