A273219 Taxi-cab numbers (A001235) that are the sum of three positive cubes.

216027, 262656, 515375, 1092728, 1331064, 1533357, 1728216, 1845649, 2101248, 2515968, 2562112, 2622104, 2864288, 3511872, 3551112, 4033503, 4123000, 4511808, 4607064, 5004125, 5462424, 5832729, 6017193, 7091712, 7882245, 8491392, 8493039, 8494577, 8741824

Offset: 1

Author

Altug Alkan, May 18 2016

Keywords

• nonn

Comments

A001235(158) = 10702783 = 7*13*337*349 is the least squarefree term of this sequence.

Examples

			216027 is a term because 216027 = 3^3 + 60^3 = 22^3 + 59^3 = 11^3 + 42^3 + 52^3.
262656 is a term because 262656 = 8^3 + 64^3 = 36^3 + 60^3 = 15^3 + 42^3 + 57^3.
515375 is a term because 515375 = 15^3 + 80^3 = 54^3 + 71^3 = 30^3 + 62^3 + 63^3.
		

Links

• Chai Wah Wu, Table of n, a(n) for n = 1..16254

Crossrefs

Cf. A001235, A003072.