A273219 - OEIS

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

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OFFSET

1,1

COMMENTS

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

LINKS

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

EXAMPLE

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.

CROSSREFS

Cf. A001235, A003072.

Sequence in context: A118875 A205924 A203730 * A351662 A251804 A184668

Adjacent sequences: A273216 A273217 A273218 * A273220 A273221 A273222

KEYWORD

nonn

AUTHOR

Altug Alkan, May 18 2016

STATUS

approved