A023051 Numbers that are the sum of two positive cubes in at least four ways (all solutions).

6963472309248, 12625136269928, 21131226514944, 26059452841000, 55707778473984, 74213505639000, 95773976104625, 101001090159424, 159380205560856, 169049812119552, 174396242861568, 188013752349696

Offset: 1

Author

David W. Wilson (revised Oct 15 1997)

Keywords

• nonn

References

• R. K. Guy, Unsolved Problems in Number Theory, D1.

Links

• Uwe Hollerbach, Table of n, a(n) for n=1..16939
• Uwe Hollerbach, Taxi, Taxi! [Original link, broken]
• Uwe Hollerbach, Taxi, Taxi! [Replacement link to Wayback Machine]
• Uwe Hollerbach, Taxi! Taxi! [Cached copy from Wayback Machine, html version of top page only]
• D. W. Wilson, The Fifth Taxicab Number is 48988659276962496, J. Integer Sequences, Vol. 2, 1999, #99.1.9.

Crossrefs

Cf. A001235, A003826, A011541, A018787, A023050, A025295, A051167, A343968, A345865.

Extensions

b-file extended by Ray Chandler, Jan 19 2009