A272885 Cubefree taxi-cab numbers.

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

Author

Altug Alkan, May 08 2016

Keywords

• nonn

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, ...

Examples

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

Crossrefs

Cf. A001235, A004709, A011541, A080642.